/*
 * Form Validation: jQuery form validation plug-in v1.1
 *
 * http://bassistance.de/jquery-plugins/jquery-plugin-validation/
 *
 * Copyright (c) 2006 JĂśrn Zaefferer
 *
 * $Id$
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */

/**
 * Validates a single form.
 *
 * The normal behaviour is to validate a form when a submit button is clicked or
 * the user presses enter when an input of that form is focused.
 *
 * It is also possible to validate each individual element of that form, eg. on blur or keyup.
 *
 * @example $("#myform").validate();
 * @before <form id="myform">
 *   <input name="firstname" class="{required:true}" />
 * </form>
 * @desc Validates a form on submit. Rules are read from metadata.
 *
 * @example $("input").validate({
 *     event: "blur",
 *    success: "valid"
 * });
 * @desc Validates all input elements on blur event (when the element looses focus).
 * Adds a class "valid" to all error labels when the elements are valid and keeps showing
 * them.
 *
 * @example $("#myform").validate({
 *   submitHandler: function(form) {
 *     $(form).ajaxSubmit();
 *   }
 * });
 * @desc Uses form plugin's ajaxSubmit method to handle the form submit, while preventing
 * the default submit.
 *
 * @example $("#myform").validate({
 *  event: "keyup"
 *   rules: {
 *     "first-name": "required",
 *     age: {
 *      required: "#firstname:blank",
 *       number: true,
 *       minValue: 3
 *     },
 *     password: {
 *       required: function() {
 *         return $("#age").val() < 18;
 *       },
 *       minLength: 5,
 *       maxLength: 32
 *     }
 *   },
 *  messages: {
 *     password: {
 *       required: function(element, validator) {
 *         return "Your password is required because with " + $("#age").val() + ", you are not old enough yet."
 *       },
 *       minLength: "Please enter a password at least 5 characters long.",
 *       maxLength: "Please enter a password no longer than 32 characters long."
 *     },
 *    age: "Please specify your age as a number (at least 3)."
 *   }
 * });
 * @desc Validate a form on submit and each element on keyup. Rules are specified
 * for three elements, and a message is customized for the "password" and the
 * "age" elements. Inline rules are ignored. The password is only required when the age is lower
 * than 18. The age is only required when the firstname is blank. Note that "first-name" is quoted, because
 * it isn't a valid javascript identifier. "first-name": "required" also uses a shortcut replacement for
 * { required: true }. That works for all trivial validations that expect no more than a boolean-true argument.
 * The required-message for password is specified as a function to use runtime customization.
 *
 * @example $("#myform").validate({
 *   errorClass: "invalid",
 *   errorLabelContainer: $("#messageBox"),
 *   wrapper: "li"
 * });
 * @before <ul id="messageBox"></ul>
 * <form id="myform" action="/login" method="post">
 *   <label>Firstname</label>
 *   <input name="fname" class="{required:true}" />
 *   <label>Lastname</label>
 *   <input name="lname" title="Your lastname, please!" class="{required:true}" />
 * </form>
 * @result <ul id="messageBox">
 *   <li><label for="fname" class="invalid">Please specify your firstname!</label></li>
 *   <li><label for="lname" class="invalid">Your lastname, please!</label></li>
 * </ul>
 * <form id="myform" action="/login" method="post">
 *   <label>Firstname</label>
 *   <input name="fname" class="{required:true} invalid" />
 *   <label>Lastname</label>
 *   <input name="lname" title="Your lastname, please!" class="{required:true} invalid" />
 * </form>
 * @desc Validates a form on submit. The class used to search, create and display
 * error labels is changed to "invalid". This is also added to invalid elements.
 *
 * All error labels are displayed inside an unordered list with the ID "messageBox", as
 * specified by the jQuery object passed as errorContainer option. All error elements
 * are wrapped inside an li element, to create a list of messages.
 *
 * To ease the setup of the form, debug option is set to true, preventing a submit
 * of the form no matter of being valid or not.
 *
 *
 * @example $("#myform").validate({
 *   errorPlacement: function(error, element) {
 *     error.appendTo( element.parent("td").next("td") );
 *   },
 *   success: function(label) {
 *     label.text("ok!").addClass("success");
 *   }
 * });
 * @before <form id="myform" action="/login" method="post">
 *   <table>
 *     <tr>
 *       <td><label>Firstname</label>
 *       <td><input name="fname" class="{required:true}" value="Pete" /></td>
 *       <td></td>
 *     </tr>
 *     <tr>
 *       <td><label>Lastname</label></td>
 *       <td><input name="lname" title="Your lastname, please!" class="{required:true}" /></td>
 *       <td></td>
 *     </tr>
 *   </table>
 * </form>
 * @result <form id="myform" action="/login" method="post">
 *   <table>
 *     <tr>
 *       <td><label>Firstname</label>
 *       <td><input name="fname" class="{required:true}" value="Pete" /></td>
 *       <td><label for="fname" class="invalid success">ok!</label></td>
 *     </tr>
 *     <tr>
 *       <td><label>Lastname</label></td>
 *       <td><input name="lname" title="Your lastname, please!" class="{required:true}" /></td>
 *       <td><label for="lname" class="invalid">Your lastname, please!</label></td>
 *     </tr>
 *   </table>
 * </form>
 * @desc Validates a form on submit. Customizes the placement of the generated labels
 * by appending them to the next table cell. Displays "ok!" for valid elements and adds a class
 * "success" to the message (the class "invalid" is kept to identify the error label).
 *
 * @example $("#myform").validate({
 *   errorContainer: $("#messageBox1, #messageBox2"),
 *   errorLabelContainer: $("#messageBox1 ul"),
 *   wrapper: "li",
 * });
 * @before <div id="messageBox1">
 *   <h3>The are errors in your form!</h3>
 *   <ul></ul>
 * </div>
 * <form id="myform" action="/login" method="post">
 *   <label>Firstname</label>
 *   <input name="fname" class="{required:true}" />
 *   <label>Lastname</label>
 *   <input name="lname" title="Your lastname, please!" class="{required:true}" />
 * </form>
 * <div id="messageBox2">
 *   <h3>The are errors in your form, see details above!</h3>
 * </div>
 * @result <ul id="messageBox">
 *   <li><label for="fname" class="error">Please specify your firstname!</label></li>
 *   <li><label for="lname" class="error">Your lastname, please!</label></li>
 * </ul>
 * <form id="myform" action="/login" method="post">
 *   <label>Firstname</label>
 *   <input name="fname" class="{required:true} error" />
 *   <label>Lastname</label>
 *   <input name="lname" title="Your lastname, please!" class="{required:true} error" />
 * </form>
 * @desc Validates a form on submit. Similar to the above example, but with an additional
 * container for error messages. The elements given as the errorContainer are all shown
 * and hidden when errors occur. But the error labels themselve are added to the element(s)
 * given as errorLabelContainer, here an unordered list. Therefore the error labels are
 * also wrapped into li elements (wrapper option).
 *
 * @param Map options Optional settings to configure validation
 * @option String errorClass Use this class to look for existing error labels and add it to
 *    invalid elements. Default: "error"
 * @option String wrapper Wrap error labels with the specified element, eg "li". Default: none
 * @option Boolean debug If true, the form is not submitted and certain errors are display on the console (requires Firebug or Firebug lite). Default: none
 * @option Boolean focusInvalid Focus the last active or first invalid element on submit or via validator.focusInvalid(). Default: true
 * @option Function submitHandler Callback for handling the actual
 *    submit when the form is valid. Gets the form as the only argmument. Default: normal form submit
 * @option Map<String, Object> messages Key/value pairs defining custom messages.
 *    Key is the name of an element, value the message to display for that element. Instead of
 *    a plain message  another map with specific messages for each rule can be used.
 *    Can be specified for one or more elements. Overrides the title attribute of an element.
 *    Each message can be a String or a Function. The Function is called with the element
 *     as the first and the validator as the second argument and must return a String to display as the message
 *     for that element.
 *      Default: none, the default message for the method is used.
 * @option Map<String, Object> rules Key/value pairs defining custom rules.
 *    Key is the ID or name (for radio/checkbox inputs) of an element,
 *    value is an object consisting of rule/parameter pairs, eg. {required: true, min: 3}.
 *     Once specified, metadata rules are completely ignored.
 *    Default: none, rules are read from metadata via metadata plugin
 * @option Boolean onsubmit Validate the form on submit. Set to false to use only other
 *    events for validation (option event). Default: true
 * @option String meta In case you use metadata for other plugins, too, you
 *    want to wrap your validation rules
 *    into their own object that can be specified via this option. Default: none
 * @option jQuery errorContainer Hide and show this container when validating. Default: none
 * @option jQuery errorLabelContainer Search and append error labels to this container, and show and hide it accordingly. Default: none
 * @option Function showErrors A custom message display handler. Gets the map of errors as the
 *    first argument and a refernce to the validator object as the second.
 *     You can trigger (in addition to your own messages) the default behaviour by calling
 *     the defaultShowErrors() method of the validator.
 *     Default: none, uses built-in message disply.
 * @option Function errorPlacement Used to customize placement of created error labels.
 *    First argument: jQuery object containing the created error label
 *    Second argument: jQuery object containing the invalid element
 *    Default: Places the error label after the invalid element
 * @option String errorElement The element to use for generated error messages. Default: "label"
 * @option String|Function If specified, the error label is displayed to show a valid element. If
 *     a String is given, its added as a class to the label. If a Function is given, its called with
 *    the label (as a jQuery object) as its only argument. That can be used to add a text like "ok!".
 *    Default: none
 * @option Boolean focusCleanup If enabled, removes the errorClass from the invalid elements and hides
 *     all errors messages whenever the element is focused. Avoid combination with focusInvalid. Default: false
 * @option String|Element ignore Elements to ignore when validating, simply filtering them out. jQuery's not-method
 *     is used, there everything that is accepted by not() can be passed as this option. Default: None, though inputs of type
 *    submit and reset are always ignored.
 * @opton Boolean onblur Validate elements on blur. If nothing is entered, all rules are skipped,
 *     except when the field was already marked as invalid. Default: true
 *
 * @name validate
 * @type $.validator
 * @cat Plugins/Validate
 */

jQuery.extend(jQuery.fn, {
  validate: function( options ) {
    var validator = new jQuery.validator( options, this[0] );

    if ( validator.settings.onsubmit ) {

      // allow suppresing validation by adding a cancel class to the submit button
      this.find("input.cancel:submit").click(function() {
        validator.cancelSubmit = true;
      });

      // validate the form on submit
      this.submit( function( event ) {
        if ( validator.settings.debug )
          // prevent form submit to be able to see console output
          event.preventDefault();

        function handle() {
          if ( validator.settings.submitHandler ) {
            validator.settings.submitHandler.call( validator, validator.currentForm );
            return false;
          }
          return true;
        }

        // prevent submit for invalid forms or custom submit handlers
        if ( validator.cancelSubmit ) {
          validator.cancelSubmit = false;
          return handle();
        }
        if ( validator.form() ) {
          if ( this.pendingRequest ) {
            this.submitted = true;
            return false;
          }
          return handle();
        } else {
          validator.focusInvalid();
          return false;
        }
      });
    }

    validator.settings.onblur && validator.elements.blur( function() {
      validator.settings.onblur.call( validator, this );
    });
    validator.settings.onkeyup && validator.elements.keyup(function() {
      validator.settings.onkeyup.call( validator, this );
    });
    var checkables = jQuery([]);
    validator.elements.each(function() {
      if ( validator.checkable( this ) )
        checkables.push( validator.checkableGroup( this ) );
    });
    validator.settings.onchange && checkables.click(function() {
      validator.settings.onchange.call( validator, this );
    });

    return validator;
  },
  // destructive add
  push: function( t ) {
    return this.setArray( jQuery.merge( this.get(), t ) );
  }
});

/**
 * Expression to filter for blank fields.
 *
 * @example jQuery("input:blank").length
 * @before <input value="" /><input value="  " /><input value="abc" />
 * @result 2
 *
 * @property
 * @type String
 * @name :blank
 * @cat Plugins/Validate
 */

/**
 * Expression to filter for filled fields.
 *
 * @example jQuery("input:filled").length
 * @before <input value="" /><input value="  " /><input value="abc" />
 * @result 1
 *
 * @property
 * @type String
 * @name :filled
 * @cat Plugins/Validate
 */

/**
 * Expression to filter unchecked checkboxes or radio buttons.
 *
 * @example jQuery("input:unchecked").length
 * @before <input type="checkbox" /><input type="checkbox" checked="checked" />
 * @result 1
 *
 * @property
 * @type String
 * @name :unchecked
 * @cat Plugins/Validate
 */
jQuery.extend(jQuery.expr[":"], {
  blank: "!jQuery.trim(a.value)",
  filled: "!!jQuery.trim(a.value)",
  unchecked: "!a.checked"
});

/**
 * Simple string-templating, similar to Java's MessageFormat.
 *
 * Accepts a string template as the first argument. The second is optional:
 * If specified, it is used to replace placeholders in the first argument.
 *
 * It can be an Array of values or any other type, in which case only one value
 * is replaced.
 *
 * If the second argument is ommited, a function is returned that expects the value-argument
 * to return the formatted value (see example).
 *
 * @example String.format("Please enter a value no longer than {0} characters.", 0)
 * @result "Please enter a value no longer than 0 characters."
 * @desc Formats a string with a single argument.
 *
 * @example String.format("Please enter a value between {0} and {1}.", 0, 1)
 * @result "Please enter a value between 0 and 1."
 * @desc Formats a string with two arguments. Same as String.format("...", [0, 1]);
 *
 * @example String.format("Please enter a value no longer than {0} characters.")(0);
 * @result "Please enter a value no longer than 0 characters."
 * @desc String.format is called at first without the second argument, returning a function that is called immediately
 *      with the value argument. Useful to defer the actual formatting to a later point without explicitly
 *     writing the function.
 *
 * @type String
 * @name String.format
 * @cat Plugins/Validate
 */
String.format = function(source, params) {
  if ( arguments.length == 1 )
    return function() {
      var args = jQuery.makeArray(arguments);
      args.unshift(source)
      return String.format.apply( this, args );
    };
  if ( arguments.length > 2 && params.constructor != Array  ) {
    params = jQuery.makeArray(arguments).slice(1);
  }
  if ( params.constructor != Array ) {
    params = [ params ];
  }
  jQuery.each(params, function(i, n) {
    source = source.replace(new RegExp("\\{" + i + "\\}", "g"), n);
  });
  return source;
};

// constructor for validator
jQuery.validator = function( options, form ) {
  this.settings = jQuery.extend( {}, jQuery.validator.defaults, options );

  this.currentForm = form;
  this.labelContainer = this.settings.errorLabelContainer;
  this.errorContext = this.labelContainer.length && this.labelContainer || jQuery(form);
  this.containers = this.settings.errorContainer.add( this.settings.errorLabelContainer );
  this.submitted = {};
  this.valueCache = {};
  this.pendingRequest = 0;
  this.invalid = {};
  this.reset();
  this.refresh();
};

jQuery.extend(jQuery.validator, {

  defaults: {
    messages: {},
    errorClass: "error",
    errorElement: "label",
    focusInvalid: true,
    errorContainer: jQuery( [] ),
    errorLabelContainer: jQuery( [] ),
    onsubmit: true,
    ignore: [],
    onblur: function(element) {
      if ( !this.checkable(element) && (element.name in this.submitted || !this.optional(element)) ) {
        this.element(element);
      }
    },
    onkeyup: function(element) {
      if ( element.name in this.submitted || element == this.lastElement ) {
        this.element(element);
      }
    },
    onchange: function(element) {
      if ( element.name in this.submitted )
        this.element(element);
    }
  },

  /**
  * Modify default settings for validation.
  *
  * @example jQuery.validator.setDefaults({
  *   debug: true
  * );
  * @desc Sets the debug setting for all validation calls following.
  *
  * @param Object<String, Object> settings
  * @name jQuery.validator.setDefaults
  * @type undefined
  * @cat Plugins/Validate
  */
  setDefaults: function(settings) {
    jQuery.extend( jQuery.validator.defaults, settings );
  },

  /**
  * Default messages for all default methods.
  *
  * Use addMethod() to add methods with messages.
  *
  * Replace these messages for localization.
  *
  * @property
  * @type String
  * @name jQuery.validator.messages
  * @cat Plugins/Validate
  */
  messages: {
    required: "Das Feld darf nicht leer sein.",
    remote: "Please fix this field.",
    email: "Bitte valide E-Mail Adresse eingeben.",
    url: "Bitte valide URL eingeben.",
    date: "Bitte valides Datum eingeben.",
    dateISO: "Bitte Datum eingeben (ISO).",
    dateDE: "Bitte geben Sie ein gültiges Datum ein.",
    number: "Bitte eine Zahl eingeben.",
    numberDE: "Bitte geben Sie eine gültige Zahl ein. ",
    digits: "Nur Ziffern eingeben",
    creditcard: "Bitte gültige Kreditkartennummer eingeben.",
    equalTo: "Bitte wiederholen Sie Eingabe des Feldes.",
    accept: "Bitte nur erlaubte Dateiart auswählen.",
    maxLength: String.format("Bitte geben Sie ein wort nich länger als {0} Zeichen."),
    minLength: String.format("Bitte min {0} Zeichen eingeben."),
    rangeLength: String.format("Bitte geben Sie zwischen {0} und {1} Zeichen ein."),
    rangeValue: String.format("Bitte geben Sie eine Zahl zwischen {0} und {1} ein."),
    maxValue: String.format("Bitte geben Sie ieine Zahl <= {0} ein."),
    minValue: String.format("Bitte geben Sie eine Zahl >= {0} ein.")
  },

  prototype: {

    /**
    * Validate on instant the entire form.
    *
    * @example $("#myform").validate().form();
    * @desc Triggers form validation programmatcitally.
    *
    * @name jQuery.validator.protoype.form
    * @type Boolean True when the form is valid, otherwise false
    * @cat Plugins/Validate
    */
    form: function() {
      this.prepareForm();
      for ( var i = 0; this.elements[i]; i++ ) {
        this.check( this.elements[i] );
      }
      jQuery.extend(this.submitted, this.errorMap);
      this.invalid = jQuery.extend({}, this.errorMap);
      this.settings.invalidHandler && this.settings.invalidHandler.call(this);
      this.showErrors();
      return this.valid();
    },

    /**
    * Validate on instant a single element.
    *
    * @example $("#myform").validate().element( "#myselect" );
    * @desc Triggers validation on a single element programmatically.
    *
    * @param String|Element element A selector or an element to validate
    *
    * @name jQuery.validator.protoype.element
    * @type Boolean True when the element is valid, otherwise false
    * @cat Plugins/Validate
    */
    element: function( element ) {
      element = this.clean( element );
      this.lastElement = element;
      this.prepareElement( element );
      var result = this.check( element );
      if ( result ) {
        delete this.invalid[element.name];
      } else {
        this.invalid[element.name] = true;
      }
      this.showErrors();
      return result;
    },

    /**
    * Show the specified messages.
    *
    * @example var validator = $("#myform").validate();
    * validator.showErrors({"firstname": "I know that your firstname is Pete, Pete!"});
    * @desc Adds and shows error message programmatically.
    *
    * @param Map errors One or more key/value pairs of input names and messages
    *
    * @name jQuery.validator.protoype.showErrors
    * @cat Plugins/Validate
    */
    showErrors: function(errors) {
      if(errors) {
        // add items to error list and map
        jQuery.extend( this.errorMap, errors );
        for ( name in errors ) {
          this.errorList.push({
            message: errors[name],
            element: jQuery("[@name='" + name + "']:first", this.currentForm)[0]
          });
        }
        // remove items from success list
        this.successList = jQuery.grep( this.successList, function(element) {
          return !(element.name in errors);
        });
      }
      this.settings.showErrors
        ? this.settings.showErrors.call( this, this.errorMap, this.errorList )
        : this.defaultShowErrors();
    },

    /**
    * Resets the controlled form, including resetting input fields
    * to their original value (requires form plugin), removing classes
    * indicating invalid elements and hiding error messages.
    *
    * @example var validator = $("#myform").validate();
    * validator.resetForm();
    * @desc Reset the form controlled by this validator.
    *
    * @name jQuery.validator.protoype.resetForm
    * @cat Plugins/Validate
    */
    resetForm: function() {
      if ( jQuery.fn.resetForm )
        jQuery( this.currentForm ).resetForm();
      this.prepareForm();
      this.hideErrors();
      this.elements.removeClass( this.settings.errorClass );
    },

    /**
    * Returns the number of invalid elements in the form.
    *
    * @example $("#myform").validate({
    *   showErrors: function() {
    *     $("#summary").html("Your form contains " + this.numberOfInvalids() + " errors, see details below.");
    *     this.defaultShowErrors();
    *   }
    * });
    * @desc Specifies a custom showErrors callback that updates the number of invalid elements each
    * time the form or a single element is validated.
    *
    * @name jQuery.validator.prototype.numberOfInvalids
    * @type Number
    */
    numberOfInvalids: function() {
      var count = 0;
      for ( i in this.invalid )
        count++;
      return count;
    },

    /**
    * Hides all error messages in this form.
    *
    * @example var validator = $("#myform").validate();
    * $(".cancel").click(function() {
    *   validator.hideErrors();
    * });
    * @desc Specifies a custom showErrors callback that updates the number of invalid elements each
    * time the form or a single element is validated.
    *
    * @name jQuery.validator.prototype.hideErrors
    */
    hideErrors: function() {
      this.addWrapper( this.toHide ).hide();
    },

    valid: function() {
      return this.size() == 0;
    },

    size: function() {
      return this.errorList.length;
    },

    focusInvalid: function() {
      if( this.settings.focusInvalid ) {
        try {
          jQuery(this.findLastActive() || this.errorList.length && this.errorList[0].element || []).filter(":visible").focus();
        } catch(e) { /* ignore IE throwing errors when focusing hidden elements */ }
      }
    },

    findLastActive: function() {
      var lastActive = this.lastActive;
      return lastActive && jQuery.grep(this.errorList, function(n) {
        return n.element.name == lastActive.name;
      }).length == 1 && lastActive;
    },

    refresh: function() {
      var validator = this;
      validator.rulesCache = {};

      // select all valid inputs inside the form (no submit or reset buttons)
      this.elements = jQuery(this.currentForm)
      .find("input, select, textarea, button")
      .not(":submit, :reset, :button")
      .not( this.settings.ignore )
      .filter(function() {
        !this.name && validator.settings.debug && window.console && console.error( "%o has no name assigned", this);

        // select only the first element for each name, and only those with rules specified
        if ( this.name in validator.rulesCache || !validator.rules(this).length )
          return false;

        validator.rulesCache[this.name] = validator.rules(this);
        return true;
      });


      // and listen for focus events to save reference to last focused element
      this.elements.focus(function() {
        validator.lastActive = this;

        // hide error label and remove error class on focus if enabled
        if ( validator.settings.focusCleanup ) {
          jQuery(this).removeClass( validator.settings.errorClass );
          validator.errorsFor(this).hide();
        }
      });
    },

    clean: function( selector ) {
      return jQuery( selector )[0];
    },

    errors: function() {
      return jQuery( this.settings.errorElement + "." + this.settings.errorClass, this.errorContext );
    },

    reset: function( element ) {
      this.successList = [];
      this.errorList = [];
      this.errorMap = {};
      this.toShow = jQuery( [] );
      this.toHide = jQuery( [] );
    },

    prepareForm: function() {
      this.reset();
      this.toHide = this.errors().push( this.containers );
    },

    prepareElement: function( element ) {
      this.reset();
      this.toHide = this.errorsFor( this.clean(element) );
    },

    check: function( element ) {
      element = this.clean( element );
      jQuery( element ).removeClass( this.settings.errorClass );
      //var rules = this.rules( element );
      var rules = this.rulesCache[ element.name ];
      for( var i = 0; rules[i]; i++) {
        var rule = rules[i];
        try {
          var result = jQuery.validator.methods[rule.method].call( this, jQuery.trim(element.value), element, rule.parameters );
          if( result === -1 )
            break;
          if( !result ) {
            jQuery( element ).addClass( this.settings.errorClass );
            this.formatAndAdd( rule, element);
            return false;
          }
        } catch(e) {
          this.settings.debug && window.console && console.error("exception occured when checking element " + element.id
            + ", check the '" + rule.method + "' method");
          throw e;
        }
      }
      // show the label for valid elements if success callback is configured
      if ( rules.length && this.settings.success )
        this.successList.push(element);
      return true;
    },

    configuredMessage: function( id, method ) {
      var m = this.settings.messages[id];
      return m && (m.constructor == String
        ? m
        : m[method]);
    },

    defaultMessage: function( element, method) {
      return this.configuredMessage( element.name, method )
        || element.title
        || jQuery.validator.messages[method]
        || "<strong>Warning: No message defined for " + element.name + "</strong>";
    },

    formatAndAdd: function( rule, element) {
      var message = this.defaultMessage( element, rule.method );
      if ( typeof message == "function" )
        message = message.call(this, rule.parameters, element);
      this.errorList.push({
        message: message,
        element: element
      });
      this.errorMap[element.name] = message;
      this.submitted[element.name] = message;
    },

    addWrapper: function(toToggle) {
      if ( this.settings.wrapper )
        toToggle.push( toToggle.parents( this.settings.wrapper ) );
      return toToggle;
    },

    defaultShowErrors: function() {
      for ( var i = 0; this.errorList[i]; i++ ) {
        var error = this.errorList[i];
        this.showLabel( error.element, error.message );
      }
      if( this.errorList.length ) {
        this.toShow.push( this.containers );
      }
      for ( var i = 0; this.successList[i]; i++ ) {
        this.showLabel( this.successList[i] );
      }
      this.toHide = this.toHide.not( this.toShow );
      this.hideErrors();
      this.addWrapper( this.toShow ).show();
    },

    showLabel: function(element, message) {
      var label = this.errorsFor( element );
      if ( label.length ) {
        // refresh error/success class
        label.removeClass().addClass( this.settings.errorClass );

        // check if we have a generated label, replace the message then
        if( this.settings.overrideErrors || label.attr("generated") ) {
          label.html(message);
        }
      } else {
        // create label
        label = jQuery("<" + this.settings.errorElement + "></" + this.settings.errorElement + ">")
          .attr({"for":  this.idOrName(element), generated: true})
          .addClass(this.settings.errorClass)
          .html(message || "");
        if ( this.settings.wrapper ) {
          // make sure the element is visible, even in IE
          // actually showing the wrapped element is handled elsewhere
          label = label.hide().show().wrap("<" + this.settings.wrapper + ">").parent();
        }
        if ( !this.labelContainer.append(label).length )
          this.settings.errorPlacement
            ? this.settings.errorPlacement(label, jQuery(element) )
            : label.insertAfter(element);
      }
      if ( !message && this.settings.success ) {
        label.text("");
        typeof this.settings.success == "string"
          ? label.addClass( this.settings.success )
          : this.settings.success( label );
      }
      this.toShow.push(label);
    },

    errorsFor: function(element) {
      return this.errors().filter("[@for='" + this.idOrName(element) + "']");
    },

    idOrName: function(element) {
      return this.checkable(element) ? element.name : element.id || element.name;
    },

    rules: function( element ) {
      var data = this.data( element );
      if( !data )
        return [];
      var rules = [];
      // convert a simple string to a {string: true} rule, eg. "required" to {required:true}
      if( typeof data == "string" ) {
        var transformed = {};
        transformed[data] = true;
        data = transformed;
      }
      jQuery.each( data, function(key, value) {
        rules[rules.length] = {
          method: key,
          parameters: value
        };
      } );
      return rules;
    },

    data: function( element ) {
      return this.settings.rules
        ? this.settings.rules[ element.name ]
        : this.settings.meta
          ? jQuery(element).data()[ this.settings.meta ]
          : jQuery(element).data();
    },

    checkable: function( element ) {
      return /radio|checkbox/i.test(element.type);
    },

    checkableGroup: function( element ) {
      return jQuery(element.form || document).find('[@name="' + element.name + '"]');
    },

    getLength: function(value, element) {
      switch( element.nodeName.toLowerCase() ) {
      case 'select':
        return jQuery("option:selected", element).length;
      case 'input':
        if( this.checkable( element) )
          return this.checkableGroup( element).filter(':checked').length;
      }
      return value.length;
    },

    depend: function(param, element) {
      return this.dependTypes[typeof param]
        ? this.dependTypes[typeof param](param, element)
        : true;
    },

    dependTypes: {
      "boolean": function(param, element) {
        return param;
      },
      "string": function(param, element) {
        return !!jQuery(param, element.form).length;
      },
      "function": function(param, element) {
        return param(element);
      }
    },

    optional: function(element) {
      return !jQuery.validator.methods.required.call(this, jQuery.trim(element.value), element);
    },

    startRequest: function() {
      this.pendingRequest++;
    },

    stopRequest: function(valid) {
      this.pendingRequest--;
      if ( valid && this.pendingRequest == 0 && this.submitted && this.form() ) {
        jQuery(this.currentForm).submit();
      }
    }

  },

  /**
  * Defines a standard set of useful validation methods.
  *
  * Use jQuery.validator.addMethod() to add your own methods.
  *
  * If "all kind of text inputs" is mentioned for any if the methods defined here,
  * it refers to input elements of type text, password and file and textareas.
  *
  * @param String value The trimmed value of the element, eg. the text of a text input (trimmed: whitespace removed at start and end)
  * @param Element element the input element itself, to check for content of attributes other than value
  * @param Object paramater Some parameter, like a number for min/max rules
  *
  * @property
  * @name jQuery.validator.methods
  * @type Object<String, Function(String,Element,Object):Boolean>
  * @cat Plugins/Validate/Methods
  */
  methods: {

    /**
    * Return false if the element is empty.
    *
    * Works with all kind of text inputs, selects, checkboxes and radio buttons.
    *
    * To force a user to select an option from a select box, provide
    * an empty options like <option value="">Choose...</option>
    *
    * @example <input name="firstname" class="{required:true}" />
    * @desc Declares an input element that is required.
    *
    * @example <input id="other" type="radio" />
    * <input name="details" class="{required:'input[@name=other]:checked'}" />
    * @desc Declares an input element required, but only if a checkbox with name 'other' is checked.
    * In other words: As long 'other' isn't checked, the details field is valid.
    * Note: The expression is evaluated in the context of the current form.
    *
    * @example jQuery("#myform").validate({
    *   rules: {
    *     details: {
    *       required: function(element) {
    *        return jQuery("#other").is(":checked") && jQuery("#other2").is(":checked");
    *      }
    *    }
    *   }
    * });
    * @before <form id="myform">
    *   <input id="other" type="checkbox" />
    *   <input id="other2" type="checkbox" />
    *   <input name="details" />
    * </form>
    * @desc Declares an input element "details" required, but only if two other fields
    * are checked.
    *
    * @example <fieldset>
    *   <legend>Family</legend>
    *   <label for="family_single">
    *     <input  type="radio" id="family_single" value="s" name="family" validate="required:true" />
    *     Single
    *   </label>
    *   <label for="family_married">
    *     <input  type="radio" id="family_married" value="m" name="family" />
    *     Married
    *   </label>
    *   <label for="family_divorced">
    *     <input  type="radio" id="family_divorced" value="d" name="family" />
    *     Divorced
    *   </label>
    *   <label for="family" class="error">Please select your family status.</label>
    * </fieldset>
    * @desc Specifies a group of radio elements. The validation rule is specified only for the first
    * element of the group.
    *
    * @param String value The value of the element to check
    * @param Element element The element to check
    * @param Boolean|String|Function param A boolean "true" makes a field always required; An expression (String)
    * is evaluated in the context of the element's form, making the field required only if the expression returns
    * more than one element. The function is executed with the element as it's only argument: If it returns true,
    * the element is required.
    *
    * @name jQuery.validator.methods.required
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    required: function(value, element, param) {
      // check if dependency is met
      if ( !this.depend(param, element) )
        return -1;
      switch( element.nodeName.toLowerCase() ) {
      case 'select':
        var options = jQuery("option:selected", element);
        return options.length > 0 && ( element.type == "select-multiple" || (jQuery.browser.msie && !(options[0].attributes['value'].specified) ? options[0].text : options[0].value).length > 0);
      case 'input':
        if ( this.checkable(element) )
          return this.getLength(value, element) > 0;
      default:
        return value.length > 0;
      }
    },

    remote: function(value, element, param) {
      if ( this.optional(element) )
        return true;

      var cached = this.valueCache[element.name];
      if(!cached) {
        this.valueCache[element.name] = cached = {
          old: null,
          valid: true,
          message: this.defaultMessage( element, "remote" )
        };
      }
      this.settings.messages[element.name].remote = typeof cached.message == "function" ? cached.message(value) : cached.message;
      if ( cached.old !== value ) {
        cached.old = value;
        var validator = this;
        this.startRequest();
        jQuery.ajax({
          url: param,
          mode: "abort",
          port: "validate",
          dataType: "json",
          data: {value: value},
          success: function(response) {
            if ( !response ) {
              var errors = {};
              errors[element.name] =  validator.defaultMessage( element, "remote" );
              validator.showErrors(errors);
            }
            cached.valid = response;
            validator.stopRequest(response);
          }
        });
        return true;
      }
      return cached.valid;
    },

    /**
    * Return false, if the element is
    *
    * - some kind of text input and its value is too short
    *
    * - a set of checkboxes has not enough boxes checked
    *
    * - a select and has not enough options selected
    *
    * Works with all kind of text inputs, checkboxes and select.
    *
    * @example <input name="firstname" class="{minLength:5}" />
    * @desc Declares an optional input element with at least 5 characters (or none at all).
    *
    * @example <input name="firstname" class="{required:true,minLength:5}" />
    * @desc Declares an input element that must have at least 5 characters.
    *
    * @example <fieldset>
    *   <legend>Spam</legend>
    *   <label for="spam_email">
    *     <input type="checkbox" id="spam_email" value="email" name="spam" validate="required:true,minLength:2" />
    *     Spam via E-Mail
    *   </label>
    *   <label for="spam_phone">
    *     <input type="checkbox" id="spam_phone" value="phone" name="spam" />
    *     Spam via Phone
    *   </label>
    *   <label for="spam_mail">
    *     <input type="checkbox" id="spam_mail" value="mail" name="spam" />
    *     Spam via Mail
    *   </label>
    *   <label for="spam" class="error">Please select at least two types of spam.</label>
    * </fieldset>
    * @desc Specifies a group of checkboxes. To validate, at least two checkboxes must be selected.
    *
    * @param Number min
    * @name jQuery.validator.methods.minLength
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    minLength: function(value, element, param) {
      return this.optional(element) || this.getLength(value, element) >= param;
    },

    /**
    * Return false, if the element is
    *
    * - some kind of text input and its value is too big
    *
    * - a set of checkboxes has too many boxes checked
    *
    * - a select and has too many options selected
    *
    * Works with all kind of text inputs, checkboxes and selects.
    *
    * @example <input name="firstname" class="{maxLength:5}" />
    * @desc Declares an input element with at most 5 characters.
    *
    * @example <input name="firstname" class="{required:true,maxLength:5}" />
    * @desc Declares an input element that must have at least one and at most 5 characters.
    *
    * @param Number max
    * @name jQuery.validator.methods.maxLength
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    maxLength: function(value, element, param) {
      return this.optional(element) || this.getLength(value, element) <= param;
    },

    /**
    * Return false, if the element is
    *
      * - some kind of text input and its value is too short or too long
      *
      * - a set of checkboxes has not enough or too many boxes checked
      *
      * - a select and has not enough or too many options selected
      *
      * Works with all kind of text inputs, checkboxes and selects.
      *
    * @example <input name="firstname" class="{rangeLength:[3,5]}" />
    * @desc Declares an optional input element with at least 3 and at most 5 characters (or none at all).
    *
    * @example <input name="firstname" class="{required:true,rangeLength:[3,5]}" />
    * @desc Declares an input element that must have at least 3 and at most 5 characters.
    *
    * @example <select id="cars" class="{required:true,rangeLength:[2,3]}" multiple="multiple">
    *   <option value="m_sl">Mercedes SL</option>
    *   <option value="o_c">Opel Corsa</option>
    *   <option value="vw_p">VW Polo</option>
    *   <option value="t_s">Titanic Skoda</option>
    * </select>
    * @desc Specifies a select that must have at least two but no more than three options selected.
    *
      * @param Array<Number> min/max
      * @name jQuery.validator.methods.rangeLength
      * @type Boolean
      * @cat Plugins/Validate/Methods
      */
    rangeLength: function(value, element, param) {
      var length = this.getLength(value, element);
      return this.optional(element) || ( length >= param[0] && length <= param[1] );
    },

    /**
    * Return true, if the value is greater than or equal to the specified minimum.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="age" class="{minValue:16}" />
    * @desc Declares an optional input element whose value must be at least 16 (or none at all).
    *
    * @example <input name="age" class="{required:true,minValue:16}" />
    * @desc Declares an input element whose value must be at least 16.
    *
    * @param Number min
    * @name jQuery.validator.methods.minValue
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    minValue: function( value, element, param ) {
      return this.optional(element) || value >= param;
    },

    /**
    * Return true, if the value is less than or equal to the specified maximum.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="age" class="{maxValue:16}" />
    * @desc Declares an optional input element whose value must be at most 16 (or none at all).
    *
    * @example <input name="age" class="{required:true,maxValue:16}" />
    * @desc Declares an input element whose required value must be at most 16.
    *
    * @param Number max
    * @name jQuery.validator.methods.maxValue
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    maxValue: function( value, element, param ) {
      return this.optional(element) || value <= param;
    },

    /**
    * Return true, if the value is in the specified range.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="age" class="{rangeValue:[4,12]}" />
    * @desc Declares an optional input element whose value must be at least 4 and at most 12 (or none at all).
    *
    * @example <input name="age" class="{required:true,rangeValue:[4,12]}" />
    * @desc Declares an input element whose required value must be at least 4 and at most 12.
    *
    * @param Array<Number> min/max
    * @name jQuery.validator.methods.rangeValue
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    rangeValue: function( value, element, param ) {
      return this.optional(element) || ( value >= param[0] && value <= param[1] );
    },

    /**
    * Return true, if the value is not a valid email address.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="email1" class="{email:true}" />
    * @desc Declares an optional input element whose value must be a valid email address (or none at all).
    *
    * @example <input name="email1" class="{required:true,email:true}" />
    * @desc Declares an input element whose value must be a valid email address.
    *
    * @name jQuery.validator.methods.email
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    email: function(value, element) {
      return this.optional(element) || /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/i.test(value);
    },

    /**
    * Return true, if the value is a valid url.
    *
    * Works with all kind of text inputs.
    *
    * See http://www.w3.org/Addressing/rfc1738.txt for URL specification.
    *
    * @example <input name="homepage" class="{url:true}" />
    * @desc Declares an optional input element whose value must be a valid URL (or none at all).
    *
    * @example <input name="homepage" class="{required:true,url:true}" />
    * @desc Declares an input element whose value must be a valid URL.
    *
    * @name jQuery.validator.methods.url
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    url: function(value, element) {
      return this.optional(element) || /^(https?|ftp):\/\/[A-Z0-9](\.?[A-Z0-9ÄÜÖ][A-Z0-9_\-ÄÜÖ]*)*(\/([A-Z0-9ÄÜÖ][A-Z0-9_\-\.ÄÜÖ]*)?)*(\?([A-Z0-9ÄÜÖ][A-Z0-9_\-\.%\+=&ÄÜÖ]*)?)?$/i.test(value);
    },

    /**
    * Return true, if the value is a valid date. Uses JavaScripts built-in
    * Date to test if the date is valid, and is therefore very limited.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="birthdate" class="{date:true}" />
    * @desc Declares an optional input element whose value must be a valid date (or none at all).
    *
    * @example <input name="birthdate" class="{required:true,date:true}" />
    * @desc Declares an input element whose value must be a valid date.
    *
    * @name jQuery.validator.methods.date
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    date: function(value, element) {
      return this.optional(element) || !/Invalid|NaN/.test(new Date(value));
    },

    /**
    * Return true, if the value is a valid date, according to ISO date standard.
    *
    * Works with all kind of text inputs.
    *
    * @example jQuery.validator.methods.dateISO("1990/01/01")
    * @result true
    *
    * @example jQuery.validator.methods.dateISO("1990-01-01")
    * @result true
    *
    * @example jQuery.validator.methods.dateISO("01.01.1990")
    * @result false
    *
    * @example <input name="birthdate" class="{dateISO:true}" />
    * @desc Declares an optional input element whose value must be a valid ISO date (or none at all).
    *
    * @name jQuery.validator.methods.date
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    dateISO: function(value, element) {
      return this.optional(element) || /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(value);
    },

    /**
    * Return true, if the value is a valid date. Supports german
    * dates (29.04.1994 or 1.1.2006). Doesn't make any sanity checks.
    *
    * Works with all kind of text inputs.
    *
    * @example jQuery.validator.methods.dateDE("1990/01/01")
    * @result false
    *
    * @example jQuery.validator.methods.dateDE("01.01.1990")
    * @result true
    *
    * @example jQuery.validator.methods.dateDE("0.1.2345")
    * @result true
    *
    * @example <input name="geburtstag" class="{dateDE:true}" />
    * @desc Declares an optional input element whose value must be a valid german date (or none at all).
    *
    * @name jQuery.validator.methods.dateDE
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    dateDE: function(value, element) {
      return this.optional(element) || /^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);
    },

    /**
    * Return true, if the value is a valid number. Checks for
    * international number format, eg. 100,000.59
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="amount" class="{number:true}" />
    * @desc Declares an optional input element whose value must be a valid number (or none at all).
    *
    * @name jQuery.validator.methods.number
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    number: function(value, element) {
      return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/.test(value);
    },

    /**
    * Return true, if the value is a valid number.
    *
    * Works with all kind of text inputs.
    *
    * Checks for german numbers (100.000,59)
    *
    * @example <input name="menge" class="{numberDE:true}" />
    * @desc Declares an optional input element whose value must be a valid german number (or none at all).
    *
    * @name jQuery.validator.methods.numberDE
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    numberDE: function(value, element) {
      return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(value);
    },

    /**
    * Returns true if the value contains only digits.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="serialnumber" class="{digits:true}" />
    * @desc Declares an optional input element whose value must contain only digits (or none at all).
    *
    * @name jQuery.validator.methods.digits
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    digits: function(value, element) {
      return this.optional(element) || /^\d+$/.test(value);
    },

    /**
         * Return true, if the value is a valid credit card number.
         *
         * Works with all kind of text inputs.
         *
         * @example <input name="cc1" class="{required:true,creditcard:true}" />
         * @desc Declares a required input element whose value must be a valid credit card number (ignoring any non-digts).
         *
         * @example <input name="cc2" class="{required:true,digits:true,creditcard:true}" />
         * @desc Declares a required input element whose value must be a valid credit card number.  No spaces or dashes allowed.
         *
         * @name jQuery.validator.methods.creditcard
         * @type Boolean
         * @cat Plugins/Validate/Methods
         */
    creditcard: function(value, element) {
      if ( this.optional(element) )
        return true;
      var nCheck = 0,
        nDigit = 0,
        bEven = false;

      value = value.replace(/\D/g, "");

      for (n = value.length - 1; n >= 0; n--) {
        var cDigit = value.charAt(n);
        var nDigit = parseInt(cDigit, 10);
        if (bEven) {
          if ((nDigit *= 2) > 9)
            nDigit -= 9;
        }
        nCheck += nDigit;
        bEven = !bEven;
      }

      return (nCheck % 10) == 0;
    },

    /**
    * Returns true if the value ends with one of the specified file extensions.
    * If nothing is specified, only images are allowed (default-param: "png|jpe?g|gif").
    *
    * Works with all kind of text inputs.
    *
    * @example <input type="file" name="avatar" class="{accept:true}" />
    * @desc Declares an optional file input element whose value must ends with '.png', '.jpg', '.jpeg' or '.gif'.
    *
    * @example <input type="file" name="avatar" class="{accept:'txt|docx?'}" />
    * @desc Declares an optional file input element whose value must ends with '.txt' or '.doc' or '.docx'.
    *
    * @name jQuery.validator.methods.accept
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    accept: function(value, element, param) {
      param = typeof param == "string" ? param : "png|jpe?g|gif";
      return this.optional(element) || value.match(new RegExp(".(" + param + ")$"));
    },

    /**
    * Returns true if the value has the same value
    * as the element specified by the first parameter.
    *
    * Keep the expression simple to avoid spaces when using metadata.
    *
    * Works with all kind of text inputs.
    *
    * @example <input name="email" id="email" class="{required:true,email:true'}" />
    * <input name="emailAgain" class="{equalTo:'#email'}" />
    * @desc Declares two input elements: The first must contain a valid email address,
    * the second must contain the same adress, enter once more. The paramter is a
    * expression used via jQuery to select the element.
    *
    * @param String selection A jQuery expression
    * @name jQuery.validator.methods.equalTo
    * @type Boolean
    * @cat Plugins/Validate/Methods
    */
    equalTo: function(value, element, param) {
      return value == jQuery(param).val();
    }

  },

  /**
  * Add a new validation method. It must consist of a name (must be a legal
  * javascript identifier), a function and a default message.
  *
  * Please note: While the temptation is great to
  * add a regex method that checks it's paramter against the value,
  * it is much cleaner to encapsulate those regular expressions
  * inside their own method. If you need lots of slightly different
  * expressions, try to extract a common parameter.
  *
  * A library of regular expressions: http://regexlib.com/DisplayPatterns.aspx
  *
  * @example jQuery.validator.addMethod("domain", function(value) {
  *   return /^http://mycorporatedomain.com/.test(value);
  * }, "Please specify the correct domain for your documents");
  * @desc Adds a method that checks if the value starts with http://mycorporatedomain.com
  *
  * @example jQuery.validator.addMethod("math", function(value, element, params) {
  *  return this.optional(value, element) || value == params[0] + params[1];
  * }, "Please enter the correct value for this simple question.");
  * @desc Adds a not-required method...
  *
  * @see jQuery.validator.methods
  *
  * @param String name The name of the method, used to identify and referencing it, must be a valid javascript identifier
  * @param Function rule The actual method implementation, returning true if an element is valid
  * @param String message The default message to display for this method
  *
  * @name jQuery.validator.addMethod
  * @type undefined
  * @cat Plugins/Validate
  */
  addMethod: function(name, method, message) {
    jQuery.validator.methods[name] = method;
    jQuery.validator.messages[name] = message;
  }
});