jQuery.extend(jQuery.fn, {
	validate: function( options ) {
		
		var validator = new jQuery.validator( options, this[0]);
		
		if ( validator.settings.onsubmit ) {
		
			this.find("input.cancel:submit").click(function() {
				validator.cancelSubmit = true;
			});
		
			this.find("input.submit").click(function() {
				validator.submitBtn = this;
			});
		
			this.submit( function( event ) {

				if ( validator.settings.debug )
					event.preventDefault();
				
				function handle() {
					if ( validator.settings.submitHandler ) {
						validator.settings.submitHandler.call( validator, validator.currentForm );
						if(includesubmit) {
							return true;
						} else return false;
					}
					
								if($("form#paymentDetails").length > 0) {

						if(!$.fn.formOverlay.currentlyActive) {

							$.fn.formOverlay.currentlyActive = true;
							$.fn.formOverlay.displayOverlay();
							//validator.submit();
						}
					}
					return true;
				}
				if ( validator.cancelSubmit ) {
					validator.cancelSubmit = false;
					return handle();
				}
				if ( validator.form() ) {
					return handle();
				} else {
					validator.focusInvalid(validator.submitBtn);
					return false;
				}
				
			});
		}
		return validator;
	},
	push: function( t ) {
		return this.setArray( jQuery.merge( this.get(), t ) );
	}
});

jQuery.extend(jQuery.expr[":"], {
	blank: "!jQuery.trim(a.value)",
	filled: "!!jQuery.trim(a.value)",
	unchecked: "!a.checked"
});

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;
};

jQuery.validator = function( options, form ) {
	this.settings = jQuery.extend( {}, jQuery.validator.defaults, options );
	this.submitBtn = {};
	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.invalid = {};
	this.reset();
	this.refresh();
};

jQuery.extend(jQuery.validator, {

	defaults: {
		messages: {},
		errorElement: "em",
		errorClass: "errorMessage",
		errorPlacement: function(error,element){
			element.parents("div.formElement,div.formContent, div.multiline").find("em.error, em.incomplete, em.success").remove();
			if(error.children("span").html() == " "){
				if(element.parents("div.formElement,div.formContent, div.multiline").find("em.valError").length < 1){
					element.after("<em class='valError'/>");
				}
			} else {
				element.after(error).after("<em class='valError'/>");
			}
		},
		success: function(label){
			label.removeClass("errorMessage").addClass("success");
			label.siblings("em").remove();
		},
		focusInvalid: true,
		errorContainer: jQuery( [] ),
		errorLabelContainer: jQuery( [] ),
		onsubmit: true,
		ignore: [],
		onblur: function(element) {
			if ( !this.checkable(element) && (element.name in this.submitted || !this.required(element)) ) {
				this.element(element);
			}
		},
		onkeyup: function(element) {
			if ( element.name in this.submitted || element == this.lastElement ) {
				this.element(element);
			}
		},
		onclick: function(element) {
			if ( element.name in this.submitted )
				this.element(element);
		}
	},

	setDefaults: function(settings) {
		jQuery.extend( jQuery.validator.defaults, settings );
	},

	messages: {
		required: "&nbsp;"
	},
	
	prototype: {

		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();
		},

		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;
		},

		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();
		},

		resetForm: function() {
			if ( jQuery.fn.resetForm )
				jQuery( this.currentForm ).resetForm();
			this.prepareForm();
			this.hideErrors();
			this.elements.removeClass( this.settings.errorClass );
		},
		
		numberOfInvalids: function() {
			var count = 0;
			for ( i in this.invalid )
				count++;
			return count;
		},
		
		hideErrors: function() {
			this.addWrapper( this.toHide ).hide();
		},
		
		valid: function() {
			return this.size() == 0;
		},
		
		size: function() {
			return this.errorList.length;
		},
		
		focusInvalid: function(submitBtn) {
			
			this.submitBtn = submitBtn
			
			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 = {};
			function focused() {
				validator.lastActive = this;
				
				if ( validator.settings.focusCleanup && !validator.blockFocusCleanup ) {
					jQuery(this).removeClass( validator.settings.errorClass );
					validator.errorsFor(this).hide();
				}
			}

			this.elements = jQuery(this.currentForm)
			.find("input, select, textarea")
			.not(":submit, :reset")
			.not("[@disabled]")
			.not( this.settings.ignore )
			.filter(function() {
				
			!this.name && validator.settings.debug && window.console && console.error( "%o has no name assigned", this);
			
				if ( this.name in validator.rulesCache || !validator.rules(this).length )
					return false;
				
				validator.rulesCache[this.name] = validator.rules(this);
				return true;
			});
			
			this.elements.focus(focused);
			
			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 );
			});
			
			if ( validator.settings.onclick ) {
				var checkables = jQuery([]);
				validator.elements.each(function() {
					if ( validator.checkable( this ) )
						checkables.push( validator.checkableGroup( this ) );
				});
				checkables.click(function() {
					validator.settings.onclick.call( validator, this );
				});
			}
		},
		
		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 ) {
			
			if(!$(this.submitBtn).attr("id")){
				$(this.submitBtn).attr("id", "none");
			}
			if(!($(this.submitBtn).attr("id").match("exclude_2") && $(element).attr("id").match("_2"))){	
				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;
					}
				}
				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]
				|| "</>";
		},
		
		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 wrappedMessage = "<span>"+message+"</span>";
			var label = this.errorsFor( element );
			if ( label.length ) {
				label.removeClass().addClass( this.settings.errorClass );
			
				if( this.settings.overrideErrors || label.attr("generated") ) {
					label.html(wrappedMessage);
				}
			} else {
				label = jQuery("<" + this.settings.errorElement + "/>")
					.attr({"for":  this.idOrName(element), generated: true})
					.addClass(this.settings.errorClass)
					.html(wrappedMessage || " ");
				if ( this.settings.wrapper ) {
					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(" ");
				label.html("&nbsp;")
				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 = [];
			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);
			}
		},
		
		required: function(element) {
			return !jQuery.validator.methods.required.call(this, jQuery.trim(element.value), element);
		}
		
	},
	
	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;
			}
		},

		minLength: function(value, element, param) {
			return this.required(element) || this.getLength(value, element) >= param;
		},
	
		maxLength: function(value, element, param) {
			return this.required(element) || this.getLength(value, element) <= param;
		},
		
		rangeLength: function(value, element, param) {
			var length = this.getLength(value, element);
			return this.required(element) || ( length >= param[0] && length <= param[1] );
		},
	
		minValue: function( value, element, param ) {
			return this.required(element) || value >= param;
		},
		
		maxValue: function( value, element, param ) {
			return this.required(element) || value <= param;
		},
		
		rangeValue: function( value, element, param ) {
			return this.required(element) || ( value >= param[0] && value <= param[1] );
		},
		
		email: function(value, element) {
			return this.required(element) || /^[\w-+\.]+@([\w-]+\.)+[\w-]{2,}$/i.test(value);
		},
		
		postcode: function(value, element) {
			return this.required(element) || /^([A-PR-UWYZ0-9][A-HK-Y0-9][AEHMNPRTVXY0-9]?[ABEHMNPRVWXY0-9]? {1,2}[0-9][ABD-HJLN-UW-Z]{2}|GIR 0AA)$/i.test(value);
		},
		
		/*url: function(value, element) {
			return this.required(element) || /^(https?|ftp):\/\/[A-Z0-9](\.?[A-Z0-9能謁[A-Z0-9_\-能謁*)*(\/([A-Z0-9能謁[A-Z0-9_\-\.能謁*)?)*(\?([A-Z0-9能謁[A-Z0-9_\-\.%\+=&能謁*)?)?$/i.test(value);
		},*/
        
		date: function(value, element) {
			return this.required(element) || !/Invalid|NaN/.test(new Date(value));
		},
	
		dateISO: function(value, element) {
			return this.required(element) || /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(value);
		},
		
		dateDE: function(value, element) {
			return this.required(element) || /^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);
		},
	
		number: function(value, element) {
			return this.required(element) || /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/.test(value);
		},
	
		numberDE: function(value, element) {
			return this.required(element) || /^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(value);
		},
		
		digits: function(value, element) {
			return this.required(element) || /^\d+$/.test(value);
		},
		
		creditcard: function(value, element) {
			if ( this.required(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;
		},
		
		accept: function(value, element, param) {
			param = typeof param == "string" ? param : "png|jpe?g|gif";
			return this.required(element) || value.match(new RegExp(".(" + param + ")$")); 
		},
		
		equalTo: function(value, element, param) {
			return value == jQuery(param).val();
		},
		
		notEqualTo: function(value, element, param) {
			return value != jQuery(param).val();
		}
		
	},
	
	addMethod: function(name, method, message) {
		jQuery.validator.methods[name] = method;
		jQuery.validator.messages[name] = message;
	}
});