$(document).ready(function (){
							
			$('#login').load('/login.php', function() {

			var username = $("#username"),
			password = $("#password"),
			gallery = $("#gallery"),
			tips = $("#validateTips"),
			tipstxt = $("#tipsTxt"),
			icon = $("#Icon"),
			allFields = $([]).add(username).add(password).add(gallery).add(tips);
					
			function updateTips(t) {
				icon.removeClass('ui-icon ui-icon-info').addClass('ui-icon ui-icon-alert');
				tipstxt.text(t);
				tips.addClass('ui-state-error');
				//tips.text(t).effect("highlight",{},1500);
			}
			
			function checkLength(o,n,min,max) {

				if ( o.val().length > max || o.val().length < min ) {
					o.addClass('ui-state-error');
					updateTips("Length of " + n + " must be between "+min+" and "+max+".");
					return false;
				} else {
					return true;
				}

			}

			function checkRegexp(o,regexp,n) {

				if ( !( regexp.test( o.val() ) ) ) {
					o.addClass('ui-state-error');
					updateTips(n);
					return false;
				} else {
					return true;
				}

			}
			
			var $dialog = $('#login').dialog({ 
					width: 460, 
					autoOpen:false,
					modal:true,
					buttons: {
				
					'Login': function() {
						var bValid = true;
						allFields.removeClass('ui-state-error');
						icon.removeClass('ui-icon ui-icon-alert').addClass('ui-icon ui-icon-info');
						tipstxt.text('All form fields are required..');

						bValid = bValid && checkLength(username,"username",6,25);
						bValid = bValid && checkLength(password,"password",6,25);

						bValid = bValid && checkRegexp(username,/^[a-z]([0-9a-z_])+$/i,"Username may consist of a-z, 0-9, underscores, begin with a letter.");
						bValid = bValid && checkRegexp(password,/^([0-9a-zA-Z])+$/,"Password field only allow : a-z 0-9");
					
						if (bValid) {
							  $("#login").slideUp("normal", function() {
							  	$("#login").before('<h2>Error</h2><p>Username and password combination was incorrect.</p>');
							  });
						}
					},
					
					Cancel: function() {
						$(this).dialog('close');
					}
				},
				
				close: function() {
					allFields.removeClass('ui-state-error');
					icon.removeClass('ui-icon ui-icon-alert').addClass('ui-icon ui-icon-info');
					tipstxt.text('All form fields are required..');
				}

			});
			
           $('.lock').click(function(){
               	$dialog.dialog('open');   
           });
		   
														 });
					   
});