// LiveValidation 1.2 (standalone version)
// Copyright (c) 2007 Alec Hill (www.livevalidation.com)
// LiveValidation is licensed under the terms of the MIT License

/*********************************************** LiveValidation class ***********************************/

/**
 *	validates a form field in real-time based on validations you assign to it
 *	
 *	@var element {mixed} - either a dom element reference or the string id of the element to validate
 *	@var optionsObj {Object} - general options, see below for details
 *
 *	optionsObj properties:
 *							validMessage {String} 	- the message to show when the field passes validation
 *													  (DEFAULT: "Thankyou!")
 *							onValid {Function} 		- function to execute when field passes validation
 *													  (DEFAULT: function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); } )	
 *							onInvalid {Function} 	- function to execute when field fails validation
 *													  (DEFAULT: function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); })
 *							insertAfterWhatNode {Int} 	- position to insert default message
 *													  (DEFAULT: the field that is being validated)	
 *              onlyOnBlur {Boolean} - whether you want it to validate as you type or only on blur
 *                            (DEFAULT: false)
 *              wait {Integer} - the time you want it to pause from the last keystroke before it validates (ms)
 *                            (DEFAULT: 0)
 *              onlyOnSubmit {Boolean} - whether should be validated only when the form it belongs to is submitted
 *                            (DEFAULT: false)						
 */
var LiveValidation = function(element, optionsObj){
  	this.initialize(element, optionsObj);
}

/** element types constants ****/

LiveValidation.TEXTAREA 		= 1;
LiveValidation.TEXT 			    = 2;
LiveValidation.PASSWORD 		= 3;
LiveValidation.CHECKBOX 		= 4;
LiveValidation.SELECT = 5;

/****** Static methods *******/

/**
 *	pass an array of LiveValidation objects and it will validate all of them
 *	
 *	@var validations {Array} - an array of LiveValidation objects
 *	@return {Bool} - true if all passed validation, false if any fail						
 */
LiveValidation.massValidate = function(validations){
  var returnValue = true;
	for(var i = 0, len = validations.length; i < len; ++i ){
		var valid = validations[i].validate();
		if(returnValue) returnValue = valid;
	}
	return returnValue;
}

/****** prototype ******/

LiveValidation.prototype = {

    validClass: 'LV_valid',
    invalidClass: 'LV_invalid',
    messageClass: 'LV_validation_message',
    validFieldClass: 'LV_valid_field',
    invalidFieldClass: 'LV_invalid_field',

    /**
     *	initialises all of the properties and events
     *
     * @var - Same as constructor above
     */
    initialize: function(element, optionsObj){
      var self = this;
      if(!element) throw new Error("LiveValidation::initialize - No element reference or element id has been provided!");
    	this.element = element.nodeName ? element : document.getElementById(element);
    	if(!this.element) throw new Error("LiveValidation::initialize - No element with reference or id of '" + element + "' exists!");
      // default properties that could not be initialised above
    	this.validations = [];
      this.elementType = this.getElementType();
      this.form = this.element.form;
      // options
    	var options = optionsObj || {};
    	this.validMessage = options.validMessage || 'Thankyou!';
    	this.insertAfterWhatNode = options.insertAfterWhatNode || this.element;
      this.onValid = options.onValid || function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); };
      this.onInvalid = options.onInvalid || function(){ this.insertMessage(this.createMessageSpan()); this.addFieldClass(); };	
    	this.onlyOnBlur =  options.onlyOnBlur || false;
    	this.wait = options.wait || 0;
      this.onlyOnSubmit = options.onlyOnSubmit || false;
      // add to form if it has been provided
      if(this.form){
        this.formObj = LiveValidationForm.getInstance(this.form);
        this.formObj.addField(this);
      }
      // events
    	this.element.onfocus = function(e){ self.doOnFocus(); }
      if(!this.onlyOnSubmit){
        switch(this.elementType){
          case LiveValidation.CHECKBOX:
            this.element.onclick = function(e){ self.validate(); }
          // let it run into the next to add a change event too
          case LiveValidation.SELECT:
            this.element.onchange = function(e){ self.validate(); }
            break;
          default:
            if(!this.onlyOnBlur) this.element.onkeyup = function(e){ self.deferValidation(); }
      	    this.element.onblur = function(e){ self.doOnBlur(); }
        }
      }
    },
    
    /**
     *	adds a validation to perform to a LiveValidation object
     *
     *	@var validationFunction {Function} - validation function to be used (ie Validate.Presence )
     *	@var validationParamsObj {Object} - parameters for doing the validation, if wanted or necessary
     * @return {Object} - the LiveValidation object itself so that calls can be chained
     */
    add: function(validationFunction, validationParamsObj){
      this.validations.push( {type: validationFunction, params: validationParamsObj || {} } );
      return this;
    },
    
    /**
     * makes the validation wait the alotted time from the last keystroke 
     */
    deferValidation: function(e){
      if(this.wait >= 300) this.removeMessageAndFieldClass();
    	var self = this;
      if(this.timeout) clearTimeout(self.timeout);
      this.timeout = setTimeout( function(){ self.validate() }, self.wait); 
    },
        
    /**
     * sets the focused flag to false when field loses focus 
     */
    doOnBlur: function(e){
      this.focused = false;
      this.validate(e);
    },
        
    /**
     * sets the focused flag to true when field gains focus 
     */
    doOnFocus: function(e){
      this.focused = true;
      this.removeMessageAndFieldClass()
    },
    
    /**
     *	gets the type of element, to check whether it is compatible
     *
     *	@var validationFunction {Function} - validation function to be used (ie Validate.Presence )
     *	@var validationParamsObj {Object} - parameters for doing the validation, if wanted or necessary
     */
    getElementType: function(){
      switch(true){
        case (this.element.nodeName == 'TEXTAREA'):
          return LiveValidation.TEXTAREA;
        case (this.element.nodeName == 'INPUT' && this.element.type == 'text'):
        	return LiveValidation.TEXT;
        case (this.element.nodeName == 'INPUT' && this.element.type == 'password'):
        	return LiveValidation.PASSWORD;
        case (this.element.nodeName == 'INPUT' && this.element.type == 'radio'):
        case (this.element.nodeName == 'INPUT' && this.element.type == 'checkbox'):
        	return LiveValidation.CHECKBOX;
        case (this.element.nodeName == 'SELECT'):
          return LiveValidation.SELECT;
        case (this.element.nodeName == 'INPUT'):
        	throw new Error('LiveValidation::getElementType - Cannot use LiveValidation on an ' + this.element.type + ' input!');
        default:
        	throw new Error('LiveValidation::getElementType - Element must be an input, select, or textarea!');
      }
    },
    
    /**
     *	loops through all the validations added to the LiveValidation object and checks them one by one
     *
     *	@var validationFunction {Function} - validation function to be used (ie Validate.Presence )
     *	@var validationParamsObj {Object} - parameters for doing the validation, if wanted or necessary
     * @return {Boolean} - whether the all the validations passed or if one failed
     */
    doValidations: function(){
      	this.validationFailed = false;
      	for(var i = 0, len = this.validations.length; i < len; ++i){
    	 	var validation = this.validations[i];
    		switch(validation.type){
    		   	case Validate.Presence:
                case Validate.Confirmation:
                case Validate.Acceptance:
    		   		this.displayMessageWhenEmpty = true;
    		   		this.validationFailed = !this.validateElement(validation.type, validation.params); 
    				break;
    		   	default:
    		   		this.validationFailed = !this.validateElement(validation.type, validation.params);
    		   		break;
    		}
    		if(this.validationFailed) return false;	
    	}
    	this.message = this.validMessage;
    	return true;
    },
    
    /**
     *	performs validation on the element and handles any error (validation or otherwise) it throws up
     *
     *	@var validationFunction {Function} - validation function to be used (ie Validate.Presence )
     *	@var validationParamsObj {Object} - parameters for doing the validation, if wanted or necessary
     * @return {Boolean} - whether the validation has passed or failed
     */
    validateElement: function(validationFunction, validationParamsObj){
      	var value = (this.elementType == LiveValidation.SELECT) ? this.element.options[this.element.selectedIndex].value : this.element.value;     
        if(validationFunction == Validate.Acceptance){
    	    if(this.elementType != LiveValidation.CHECKBOX) throw new Error('LiveValidation::validateElement - Element to validate acceptance must be a checkbox!');
    		value = this.element.checked;
    	}
        var isValid = true;
      	try{    
    		validationFunction(value, validationParamsObj);
    	} catch(error) {
    	  	if(error instanceof Validate.Error){
    			if( value !== '' || (value === '' && this.displayMessageWhenEmpty) ){
    				this.validationFailed = true;
    				this.message = error.message;
    				isValid = false;
    			}
    		}else{
    		  	throw error;
    		}
    	}finally{
    	    return isValid;
        }
    },
    
    /**
     *	makes it do the all the validations and fires off the onValid or onInvalid callbacks
     *
     * @return {Boolean} - whether the all the validations passed or if one failed
     */
    validate: function(){
      var isValid = this.doValidations();
    	if(isValid){
    		this.onValid();
    		return true;
    	}else{
    	  	this.onInvalid();
    	  	return false;
    	}
    },
    
    /** Message insertion methods ****************************
     * 
     * These are only used in the onValid and onInvalid callback functions and so if you overide the default callbacks,
     * you must either impliment your own functions to do whatever you want, or call some of these from them if you 
     * want to keep some of the functionality
     */
    
    /**
     *	makes a span containg the passed or failed message
     *
     * @return {HTMLSpanObject} - a span element with the message in it
     */
    createMessageSpan: function(){
        var span = document.createElement('span');
    	var textNode = document.createTextNode(this.message);
      	span.appendChild(textNode);
        return span;
    },
    
    /**
     *	inserts the element containing the message in place of the element that already exists (if it does)
     *
     * @var elementToIsert {HTMLElementObject} - an element node to insert
     */
    insertMessage: function(elementToInsert){
      	this.removeMessage();
      	if( (this.displayMessageWhenEmpty && (this.elementType == LiveValidation.CHECKBOX || this.element.value == ''))
    	  || this.element.value != '' ){
            var className = this.validationFailed ? this.invalidClass : this.validClass;
    	  	elementToInsert.className += ' ' + this.messageClass + ' ' + className;
            if(this.insertAfterWhatNode.nextSibling){
    		  		this.insertAfterWhatNode.parentNode.insertBefore(elementToInsert, this.insertAfterWhatNode.nextSibling);
    		}else{
    			    this.insertAfterWhatNode.parentNode.appendChild(elementToInsert);
    	    }
    	}
    },
    
    
    /**
     *	changes the class of the field based on whether it is valid or not
     */
    addFieldClass: function(){
        this.removeFieldClass();
        if(!this.validationFailed){
            if(this.displayMessageWhenEmpty || this.element.value != ''){
                if(this.element.className.indexOf(this.validFieldClass) == -1) this.element.className += ' ' + this.validFieldClass;
            }
        }else{
            if(this.element.className.indexOf(this.invalidFieldClass) == -1) this.element.className += ' ' + this.invalidFieldClass;
        }
    },
    
    /**
     *	removes the message element if it exists, so that the new message will replace it
     */
    removeMessage: function(){
    	var nextEl;
    	var el = this.insertAfterWhatNode;
    	while(el.nextSibling){
    	    if(el.nextSibling.nodeType === 1){
    		  	nextEl = el.nextSibling;
    		  	break;
    		}
    		el = el.nextSibling;
    	}
      	if(nextEl && nextEl.className.indexOf(this.messageClass) != -1) this.insertAfterWhatNode.parentNode.removeChild(nextEl);
    },
    
    /**
     *	removes the class that has been applied to the field to indicte if valid or not
     */
    removeFieldClass: function(){
      if(this.element.className.indexOf(this.invalidFieldClass) != -1) this.element.className = this.element.className.split(this.invalidFieldClass).join('');
      if(this.element.className.indexOf(this.validFieldClass) != -1) this.element.className = this.element.className.split(this.validFieldClass).join(' ');
    },
        
    /**
     *	removes the message and the field class
     */
    removeMessageAndFieldClass: function(){
      this.removeMessage();
      this.removeFieldClass();
    }

} // end of LiveValidation class

/*************************************** LiveValidationForm class ****************************************/
/**
 * This class is used internally by LiveValidation class to associate a LiveValidation field with a form it is icontained in one
 * 
 * It will therefore not really ever be needed to be used directly by the developer, unless they want to associate a LiveValidation 
 * field with a form that it is not a child of
 */

/**
   *	handles validation of LiveValidation fields belonging to this form on its submittal
   *	
   *	@var element {HTMLFormElement} - a dom element reference to the form to turn into a LiveValidationForm
   */
var LiveValidationForm = function(element){
  this.initialize(element);
}

/**
   *	gets the instance of the LiveValidationForm if it has already been made or creates it if it doesnt exist
   *	
   *	@var element {HTMLFormElement} - a dom element reference to a form
   */
LiveValidationForm.getInstance = function(element){
  if(!element.id) element.id = 'formId_' + new Date().valueOf();
  if(!window['LiveValidationForm_' + element.id]) window['LiveValidationForm_' + element.id] = new LiveValidationForm(element);
  return window['LiveValidationForm_' + element.id];
}

LiveValidationForm.prototype = {
  
  /**
   *	constructor for LiveValidationForm - handles validation of LiveValidation fields belonging to this form on its submittal
   *	
   *	@var element {HTMLFormElement} - a dom element reference to the form to turn into a LiveValidationForm
   */
  initialize: function(element){
    this.element = element;
    this.fields = [];
    var self = this;
    this.element.onsubmit = function(){
      return LiveValidation.massValidate(self.fields);
    }
  },
  
  /**
   *	adds a LiveValidation field to the forms fields array
   *	
   *	@var element {LiveValidation} - a LiveValidation object
   */
  addField: function(newField){
    this.fields.push(newField);
  }
   
}// end of LiveValidationForm prototype

/*************************************** Validate class ****************************************/
/**
 * This class contains all the methods needed for doing the actual validation itself
 *
 * All methods are static so that they can be used outside the context of a form field
 * as they could be useful for validating stuff anywhere you want really
 *
 * All of them will return true if the validation is successful, but will raise a ValidationError if
 * they fail, so that this can be caught and the message explaining the error can be accessed ( as just 
 * returning false would leave you a bit in the dark as to why it failed )
 *
 * Can use validation methods alone and wrap in a try..catch statement yourself if you want to access the failure
 * message and handle the error, or use the Validate::now method if you just want true or false
 */

var Validate = {

    /**
     *	validates that the field has been filled in
     *
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation 
     *													  (DEFAULT: "Can't be empty!")
     */
    Presence: function(value, paramsObj){
      	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Can't be empty!";
    	if(value === '' || value === null || value === undefined){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    
    /**
     *	validates that the value is numeric, does not fall within a given range of numbers
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							notANumberMessage {String} - the message to show when the validation fails when value is not a number
     *													  	  (DEFAULT: "Must be a number!")
     *							notAnIntegerMessage {String} - the message to show when the validation fails when value is not an integer
     *													  	  (DEFAULT: "Must be a number!")
     *							wrongNumberMessage {String} - the message to show when the validation fails when is param is used
     *													  	  (DEFAULT: "Must be {is}!")
     *							tooLowMessage {String} 		- the message to show when the validation fails when minimum param is used
     *													  	  (DEFAULT: "Must not be less than {minimum}!")
     *							tooHighMessage {String} 	- the message to show when the validation fails when maximum param is used
     *													  	  (DEFAULT: "Must not be more than {maximum}!")
     *							is {Int} 					- the length must be this long 
     *							minimum {Int} 				- the minimum length allowed
     *							maximum {Int} 				- the maximum length allowed
     *                         onlyInteger {Boolean} - if true will only allow integers to be valid
     *                                                             (DEFAULT: false)
     *
     *  NB. can be checked if it is within a range by specifying both a minimum and a maximum
     *  NB. will evaluate numbers represented in scientific form (ie 2e10) correctly as numbers				
     */
    Numericality: function(value, paramsObj){
        var suppliedValue = value;
        var value = Number(value);
    	var paramsObj = paramsObj || {};
        var minimum = ((paramsObj.minimum) || (paramsObj.minimum == 0)) ? paramsObj.minimum : null;;
        var maximum = ((paramsObj.maximum) || (paramsObj.maximum == 0)) ? paramsObj.maximum : null;
    	var is = ((paramsObj.is) || (paramsObj.is == 0)) ? paramsObj.is : null;
        var notANumberMessage = paramsObj.notANumberMessage || "Must be a number!";
        var notAnIntegerMessage = paramsObj.notAnIntegerMessage || "Must be an integer!";
    	var wrongNumberMessage = paramsObj.wrongNumberMessage || "Must be " + is + "!";
    	var tooLowMessage = paramsObj.tooLowMessage || "Must not be less than " + minimum + "!";
    	var tooHighMessage = paramsObj.tooHighMessage || "Must not be more than " + maximum + "!";
        if (!isFinite(value)) Validate.fail(notANumberMessage);
        if (paramsObj.onlyInteger && (/\.0+$|\.$/.test(String(suppliedValue))  || value != parseInt(value)) ) Validate.fail(notAnIntegerMessage);
    	switch(true){
    	  	case (is !== null):
    	  		if( value != Number(is) ) Validate.fail(wrongNumberMessage);
    			break;
    	  	case (minimum !== null && maximum !== null):
    	  		Validate.Numericality(value, {tooLowMessage: tooLowMessage, minimum: minimum});
    	  		Validate.Numericality(value, {tooHighMessage: tooHighMessage, maximum: maximum});
    	  		break;
    	  	case (minimum !== null):
    	  		if( value < Number(minimum) ) Validate.fail(tooLowMessage);
    			break;
    	  	case (maximum !== null):
    	  		if( value > Number(maximum) ) Validate.fail(tooHighMessage);
    			break;
    	}
    	return true;
    },
    
    /**
     *	validates against a RegExp pattern
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation
     *													  (DEFAULT: "Not valid!")
     *							pattern {RegExp} 		- the regular expression pattern
     *													  (DEFAULT: /./)
     *
     *  NB. will return true for an empty string, to allow for non-required, empty fields to validate.
     *		If you do not want this to be the case then you must either add a LiveValidation.PRESENCE validation
     *		or build it into the regular expression pattern
     */
    Format: function(value, paramsObj){
      	var value = String(value);
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Not valid!";
      	var pattern = paramsObj.pattern || /./;
    	if(!pattern.test(value) /* && value != ''*/ ){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    
    /**
     *	validates that the field contains a valid email address
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation
     *													  (DEFAULT: "Must be a number!" or "Must be an integer!")
     */
    Email: function(value, paramsObj){
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Must be a valid email address!";
    	Validate.Format(value, { failureMessage: message, pattern: /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i } );
    	return true;
    },
    
    /**
     *	validates the length of the value
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							wrongLengthMessage {String} - the message to show when the fails when is param is used
     *													  	  (DEFAULT: "Must be {is} characters long!")
     *							tooShortMessage {String} 	- the message to show when the fails when minimum param is used
     *													  	  (DEFAULT: "Must not be less than {minimum} characters long!")
     *							tooLongMessage {String} 	- the message to show when the fails when maximum param is used
     *													  	  (DEFAULT: "Must not be more than {maximum} characters long!")
     *							is {Int} 					- the length must be this long 
     *							minimum {Int} 				- the minimum length allowed
     *							maximum {Int} 				- the maximum length allowed
     *
     *  NB. can be checked if it is within a range by specifying both a minimum and a maximum				
     */
    Length: function(value, paramsObj){
    	var value = String(value);
    	var paramsObj = paramsObj || {};
        var minimum = ((paramsObj.minimum) || (paramsObj.minimum == 0)) ? paramsObj.minimum : null;
    	var maximum = ((paramsObj.maximum) || (paramsObj.maximum == 0)) ? paramsObj.maximum : null;
    	var is = ((paramsObj.is) || (paramsObj.is == 0)) ? paramsObj.is : null;
        var wrongLengthMessage = paramsObj.wrongLengthMessage || "Must be " + is + " characters long!";
    	var tooShortMessage = paramsObj.tooShortMessage || "Must not be less than " + minimum + " characters long!";
    	var tooLongMessage = paramsObj.tooLongMessage || "Must not be more than " + maximum + " characters long!";
    	switch(true){
    	  	case (is !== null):
    	  		if( value.length != Number(is) ) Validate.fail(wrongLengthMessage);
    			break;
    	  	case (minimum !== null && maximum !== null):
    	  		Validate.Length(value, {tooShortMessage: tooShortMessage, minimum: minimum});
    	  		Validate.Length(value, {tooLongMessage: tooLongMessage, maximum: maximum});
    	  		break;
    	  	case (minimum !== null):
    	  		if( value.length < Number(minimum) ) Validate.fail(tooShortMessage);
    			break;
    	  	case (maximum !== null):
    	  		if( value.length > Number(maximum) ) Validate.fail(tooLongMessage);
    			break;
    		default:
    			throw new Error("Validate::Length - Length(s) to validate against must be provided!");
    	}
    	return true;
    },
    
    /**
     *	validates that the value falls within a given set of values
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation
     *													  (DEFAULT: "Must be included in the list!")
     *							within {Array} 			- an array of values that the value should fall in 
     *													  (DEFAULT: [])	
     *							allowNull {Bool} 		- if true, and a null value is passed in, validates as true
     *													  (DEFAULT: false)
     *                         partialMatch {Bool} 	- if true, will not only validate against the whole value to check but also if it is a substring of the value 
     *													  (DEFAULT: false)
     *                         exclusion {Bool} 		- if true, will validate that the value is not within the given set of values
     *													  (DEFAULT: false)			
     */
    Inclusion: function(value, paramsObj){
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Must be included in the list!";
    	if(paramsObj.allowNull && value == null) return true;
        if(!paramsObj.allowNull && value == null) Validate.fail(message)
    	var list = paramsObj.within || [];
    	var found = false;
    	for(var i = 0, length = list.length; i < length; ++i){
    	  	if(list[i] == value) found = true;
            if(paramsObj.partialMatch){ 
                if(value.indexOf(list[i]) != -1) found = true;
            }
    	}
    	if( (!paramsObj.exclusion && !found) || (paramsObj.exclusion && found) ) Validate.fail(message);
    	return true;
    },
    
    /**
     *	validates that the value does not fall within a given set of values
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation
     *													  (DEFAULT: "Must not be included in the list!")
     *							within {Array} 			- an array of values that the value should not fall in 
     *													  (DEFAULT: [])
     *							allowNull {Bool} 		- if true, and a null value is passed in, validates as true
     *													  (DEFAULT: false)
     *                         partialMatch {Bool} 	- if true, will not only validate against the whole value to check but also if it is a substring of the value 
     *													  (DEFAULT: false)			
     */
    Exclusion: function(value, paramsObj){
        var paramsObj = paramsObj || {};
    	paramsObj.failureMessage = paramsObj.failureMessage || "Must not be included in the list!";
        paramsObj.exclusion = true;
    	Validate.Inclusion(value, paramsObj);
        return true;
    },
    
    /**
     *	validates that the value matches that in another field
     *	
     *	@var value {mixed} - value to be checked
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation
     *													  (DEFAULT: "Does not match!")
     *							match {String} 			- id of the field that this one should match						
     */
    Confirmation: function(value, paramsObj){
      	if(!paramsObj.match) throw new Error("Validate::Confirmation - Error validating confirmation: Id of element to match must be provided!");
    	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Does not match!";
    	var match = paramsObj.match.nodeName ? paramsObj.match : document.getElementById(paramsObj.match);
    	if(!match) throw new Error("Validate::Confirmation - There is no reference with name of, or element with id of '" + paramsObj.match + "'!");
    	if(value != match.value){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    
    /**
     *	validates that the value is true (for use primarily in detemining if a checkbox has been checked)
     *	
     *	@var value {mixed} - value to be checked if true or not (usually a boolean from the checked value of a checkbox)
     *	@var paramsObj {Object} - parameters for this particular validation, see below for details
     *
     *	paramsObj properties:
     *							failureMessage {String} - the message to show when the field fails validation 
     *													  (DEFAULT: "Must be accepted!")
     */
    Acceptance: function(value, paramsObj){
      	var paramsObj = paramsObj || {};
    	var message = paramsObj.failureMessage || "Must be accepted!";
    	if(!value){ 
    	  	Validate.fail(message);
    	}
    	return true;
    },
    
    /**
     *	validates whatever it is you pass in, and handles the validation error for you so it gives a nice true or false reply
     *
     *	@var validationFunction {Function} - validation function to be used (ie Validation.validatePresence )
     *	@var value {mixed} - value to be checked if true or not (usually a boolean from the checked value of a checkbox)
     *	@var validationParamsObj {Object} - parameters for doing the validation, if wanted or necessary
     */
    now: function(validationFunction, value, validationParamsObj){
      	if(!validationFunction) throw new Error("Validate::now - Validation function must be provided!");
    	var isValid = true;
        try{    
    		validationFunction(value, validationParamsObj || {});
    	} catch(error) {
    		if(error instanceof Validate.Error){
    			isValid =  false;
    		}else{
    		 	throw error;
    		}
    	}finally{ 
            return isValid 
        }
    },
    
    /**
     * shortcut for failing throwing a validation error
     *
     *	@var errorMessage {String} - message to display
     */
    fail: function(errorMessage){
            throw new Validate.Error(errorMessage);
    },
    
    Error: function(errorMessage){
    	this.message = errorMessage;
    	this.name = 'ValidationError';
    }

}