EDIT

/*!

 * jQuery blockUI plugin

 * Version 2.53 (01-NOV-2012)

 * @requires jQuery v1.3 or later

 *

 * Examples at: http://malsup.com/jquery/block/

 * Copyright (c) 2007-2012 M. Alsup

 * Dual licensed under the MIT and GPL licenses:

 * http://www.opensource.org/licenses/mit-license.php

 * http://www.gnu.org/licenses/gpl.html

 *

 * Thanks to Amir-Hossein Sobhi for some excellent contributions!

 */

;(function() {

"use strict";

	function setup($) {

		if (/^1\.(0|1|2)/.test($.fn.jquery)) {

			/*global alert:true */

			alert('blockUI requires jQuery v1.3 or later!  You are using v' + $.fn.jquery);

			return;

		}

		$.fn._fadeIn = $.fn.fadeIn;

		var noOp = $.noop || function() {};

		// this bit is to ensure we don't call setExpression when we shouldn't (with extra muscle to handle

		// retarded userAgent strings on Vista)

		var msie = /MSIE/.test(navigator.userAgent);

		var ie6  = /MSIE 6.0/.test(navigator.userAgent);

		var mode = document.documentMode || 0;

		// var setExpr = msie && (($.browser.version < 8 && !mode) || mode < 8);

		var setExpr = $.isFunction( document.createElement('div').style.setExpression );

		// global $ methods for blocking/unblocking the entire page

		$.blockUI   = function(opts) { install(window, opts); };

		$.unblockUI = function(opts) { remove(window, opts); };

		// convenience method for quick growl-like notifications  (http://www.google.com/search?q=growl)

		$.growlUI = function(title, message, timeout, onClose) {

			var $m = $('<div class="growlUI"></div>');

			if (title) $m.append('<h1>'+title+'</h1>');

			if (message) $m.append('<h2>'+message+'</h2>');

			if (timeout === undefined) timeout = 3000;

			$.blockUI({

				message: $m, fadeIn: 700, fadeOut: 1000, centerY: false,

				timeout: timeout, showOverlay: false,

				onUnblock: onClose,

				css: $.blockUI.defaults.growlCSS

			});

		};

		// plugin method for blocking element content

		$.fn.block = function(opts) {

			var fullOpts = $.extend({}, $.blockUI.defaults, opts || {});

			this.each(function() {

				var $el = $(this);

				if (fullOpts.ignoreIfBlocked && $el.data('blockUI.isBlocked'))

					return;

				$el.unblock({ fadeOut: 0 });

			});

			return this.each(function() {

				if ($.css(this,'position') == 'static')

					this.style.position = 'relative';

				this.style.zoom = 1; // force 'hasLayout' in ie

				install(this, opts);

			});

		};

		// plugin method for unblocking element content

		$.fn.unblock = function(opts) {

			return this.each(function() {

				remove(this, opts);

			});

		};

		$.blockUI.version = 2.53; // 2nd generation blocking at no extra cost!

		// override these in your code to change the default behavior and style

		$.blockUI.defaults = {

			// message displayed when blocking (use null for no message)

			message:  '<h1>Please wait...</h1>',

			title: null,		// title string; only used when theme == true

			draggable: true,	// only used when theme == true (requires jquery-ui.js to be loaded)

			theme: false, // set to true to use with jQuery UI themes

			// styles for the message when blocking; if you wish to disable

			// these and use an external stylesheet then do this in your code:

			// $.blockUI.defaults.css = {};

			css: {

				padding:	0,

				margin:		0,

				width:		'30%',

				top:		'40%',

				left:		'35%',

				textAlign:	'center',

				color:		'#000',

				border:		'3px solid #aaa',

				backgroundColor:'#fff',

				cursor:		'wait'

			},

			// minimal style set used when themes are used

			themedCSS: {

				width:	'30%',

				top:	'40%',

				left:	'35%'

			},

			// styles for the overlay

			overlayCSS:  {

				backgroundColor:	'#000',

				opacity:				0.6,

				cursor:				'wait'

			},

			// style to replace wait cursor before unblocking to correct issue

			// of lingering wait cursor

			cursorReset: 'default',

			// styles applied when using $.growlUI

			growlCSS: {

				width:		'350px',

				top:		'10px',

				left:		'',

				right:		'10px',

				border:		'none',

				padding:	'5px',

				opacity:	0.6,

				cursor:		'default',

				color:		'#fff',

				backgroundColor: '#000',

				'-webkit-border-radius':'10px',

				'-moz-border-radius':	'10px',

				'border-radius':		'10px'

			},

			// IE issues: 'about:blank' fails on HTTPS and javascript:false is s-l-o-w

			// (hat tip to Jorge H. N. de Vasconcelos)

			/*jshint scripturl:true */

			iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank',

			// force usage of iframe in non-IE browsers (handy for blocking applets)

			forceIframe: false,

			// z-index for the blocking overlay

			baseZ: 1000,

			// set these to true to have the message automatically centered

			centerX: true, // <-- only effects element blocking (page block controlled via css above)

			centerY: true,

			// allow body element to be stetched in ie6; this makes blocking look better

			// on "short" pages.  disable if you wish to prevent changes to the body height

			allowBodyStretch: true,

			// enable if you want key and mouse events to be disabled for content that is blocked

			bindEvents: true,

			// be default blockUI will supress tab navigation from leaving blocking content

			// (if bindEvents is true)

			constrainTabKey: true,

			// fadeIn time in millis; set to 0 to disable fadeIn on block

			fadeIn:  200,

			// fadeOut time in millis; set to 0 to disable fadeOut on unblock

			fadeOut:  400,

			// time in millis to wait before auto-unblocking; set to 0 to disable auto-unblock

			timeout: 0,

			// disable if you don't want to show the overlay

			showOverlay: true,

			// if true, focus will be placed in the first available input field when

			// page blocking

			focusInput: true,

			// suppresses the use of overlay styles on FF/Linux (due to performance issues with opacity)

			// no longer needed in 2012

			// applyPlatformOpacityRules: true,

			// callback method invoked when fadeIn has completed and blocking message is visible

			onBlock: null,

			// callback method invoked when unblocking has completed; the callback is

			// passed the element that has been unblocked (which is the window object for page

			// blocks) and the options that were passed to the unblock call:

			//	onUnblock(element, options)

			onUnblock: null,

			// callback method invoked when the overlay area is clicked.

			// setting this will turn the cursor to a pointer, otherwise cursor defined in overlayCss will be used.

			onOverlayClick: null,

			// don't ask; if you really must know: http://groups.google.com/group/jquery-en/browse_thread/thread/36640a8730503595/2f6a79a77a78e493#2f6a79a77a78e493

			quirksmodeOffsetHack: 4,

			// class name of the message block

			blockMsgClass: 'blockMsg',

			// if it is already blocked, then ignore it (don't unblock and reblock)

			ignoreIfBlocked: false

		};

		// private data and functions follow...

		var pageBlock = null;

		var pageBlockEls = [];

		function install(el, opts) {

			var css, themedCSS;

			var full = (el == window);

			var msg = (opts && opts.message !== undefined ? opts.message : undefined);

			opts = $.extend({}, $.blockUI.defaults, opts || {});

			if (opts.ignoreIfBlocked && $(el).data('blockUI.isBlocked'))

				return;

			opts.overlayCSS = $.extend({}, $.blockUI.defaults.overlayCSS, opts.overlayCSS || {});

			css = $.extend({}, $.blockUI.defaults.css, opts.css || {});

			if (opts.onOverlayClick)

				opts.overlayCSS.cursor = 'pointer';

			themedCSS = $.extend({}, $.blockUI.defaults.themedCSS, opts.themedCSS || {});

			msg = msg === undefined ? opts.message : msg;

			// remove the current block (if there is one)

			if (full && pageBlock)

				remove(window, {fadeOut:0});

			// if an existing element is being used as the blocking content then we capture

			// its current place in the DOM (and current display style) so we can restore

			// it when we unblock

			if (msg && typeof msg != 'string' && (msg.parentNode || msg.jquery)) {

				var node = msg.jquery ? msg[0] : msg;

				var data = {};

				$(el).data('blockUI.history', data);

				data.el = node;

				data.parent = node.parentNode;

				data.display = node.style.display;

				data.position = node.style.position;

				if (data.parent)

					data.parent.removeChild(node);

			}

			$(el).data('blockUI.onUnblock', opts.onUnblock);

			var z = opts.baseZ;

			// blockUI uses 3 layers for blocking, for simplicity they are all used on every platform;

			// layer1 is the iframe layer which is used to supress bleed through of underlying content

			// layer2 is the overlay layer which has opacity and a wait cursor (by default)

			// layer3 is the message content that is displayed while blocking

			var lyr1, lyr2, lyr3, s;

			if (msie || opts.forceIframe)

				lyr1 = $('<iframe class="blockUI" style="z-index:'+ (z++) +';display:none;border:none;margin:0;padding:0;position:absolute;width:100%;height:100%;top:0;left:0" src="'+opts.iframeSrc+'"></iframe>');

			else

				lyr1 = $('<div class="blockUI" style="display:none"></div>');

			if (opts.theme)

				lyr2 = $('<div class="blockUI blockOverlay ui-widget-overlay" style="z-index:'+ (z++) +';display:none"></div>');

			else

				lyr2 = $('<div class="blockUI blockOverlay" style="z-index:'+ (z++) +';display:none;border:none;margin:0;padding:0;width:100%;height:100%;top:0;left:0"></div>');

			if (opts.theme && full) {

				s = '<div class="blockUI ' + opts.blockMsgClass + ' blockPage ui-dialog ui-widget ui-corner-all" style="z-index:'+(z+10)+';display:none;position:fixed">';

				if ( opts.title ) {

					s += '<div class="ui-widget-header ui-dialog-titlebar ui-corner-all blockTitle">'+(opts.title || '&nbsp;')+'</div>';

				}

				s += '<div class="ui-widget-content ui-dialog-content"></div>';

				s += '</div>';

			}

			else if (opts.theme) {

				s = '<div class="blockUI ' + opts.blockMsgClass + ' blockElement ui-dialog ui-widget ui-corner-all" style="z-index:'+(z+10)+';display:none;position:absolute">';

				if ( opts.title ) {

					s += '<div class="ui-widget-header ui-dialog-titlebar ui-corner-all blockTitle">'+(opts.title || '&nbsp;')+'</div>';

				}  

				s += '<div class="ui-widget-content ui-dialog-content"></div>';

				s += '</div>';

			}

			else if (full) {

				s = '<div class="blockUI ' + opts.blockMsgClass + ' blockPage" style="z-index:'+(z+10)+';display:none;position:fixed"></div>';

			}

			else {

				s = '<div class="blockUI ' + opts.blockMsgClass + ' blockElement" style="z-index:'+(z+10)+';display:none;position:absolute"></div>';

			}

			lyr3 = $(s);

			// if we have a message, style it

			if (msg) {

				if (opts.theme) {

					lyr3.css(themedCSS);

					lyr3.addClass('ui-widget-content');

				}

				else

					lyr3.css(css);

			}

			// style the overlay

			if (!opts.theme /*&& (!opts.applyPlatformOpacityRules)*/)

				lyr2.css(opts.overlayCSS);

			lyr2.css('position', full ? 'fixed' : 'absolute');

			// make iframe layer transparent in IE

			if (msie || opts.forceIframe)

				lyr1.css('opacity',0.0);

			//$([lyr1[0],lyr2[0],lyr3[0]]).appendTo(full ? 'body' : el);

			var layers = [lyr1,lyr2,lyr3], $par = full ? $('body') : $(el);

			$.each(layers, function() {

				this.appendTo($par);

			});

			if (opts.theme && opts.draggable && $.fn.draggable) {

				lyr3.draggable({

					handle: '.ui-dialog-titlebar',

					cancel: 'li'

				});

			}

			// ie7 must use absolute positioning in quirks mode and to account for activex issues (when scrolling)

			var expr = setExpr && (!$.support.boxModel || $('object,embed', full ? null : el).length > 0);

			if (ie6 || expr) {

				// give body 100% height

				if (full && opts.allowBodyStretch && $.support.boxModel)

					$('html,body').css('height','100%');

				// fix ie6 issue when blocked element has a border width

				if ((ie6 || !$.support.boxModel) && !full) {

					var t = sz(el,'borderTopWidth'), l = sz(el,'borderLeftWidth');

					var fixT = t ? '(0 - '+t+')' : 0;

					var fixL = l ? '(0 - '+l+')' : 0;

				}

				// simulate fixed position

				$.each(layers, function(i,o) {

					var s = o[0].style;

					s.position = 'absolute';

					if (i < 2) {

						if (full)

							s.setExpression('height','Math.max(document.body.scrollHeight, document.body.offsetHeight) - (jQuery.support.boxModel?0:'+opts.quirksmodeOffsetHack+') + "px"');

						else

							s.setExpression('height','this.parentNode.offsetHeight + "px"');

						if (full)

							s.setExpression('width','jQuery.support.boxModel && document.documentElement.clientWidth || document.body.clientWidth + "px"');

						else

							s.setExpression('width','this.parentNode.offsetWidth + "px"');

						if (fixL) s.setExpression('left', fixL);

						if (fixT) s.setExpression('top', fixT);

					}

					else if (opts.centerY) {

						if (full) s.setExpression('top','(document.documentElement.clientHeight || document.body.clientHeight) / 2 - (this.offsetHeight / 2) + (blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + "px"');

						s.marginTop = 0;

					}

					else if (!opts.centerY && full) {

						var top = (opts.css && opts.css.top) ? parseInt(opts.css.top, 10) : 0;

						var expression = '((document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + '+top+') + "px"';

						s.setExpression('top',expression);

					}

				});

			}

			// show the message

			if (msg) {

				if (opts.theme)

					lyr3.find('.ui-widget-content').append(msg);

				else

					lyr3.append(msg);

				if (msg.jquery || msg.nodeType)

					$(msg).show();

			}

			if ((msie || opts.forceIframe) && opts.showOverlay)

				lyr1.show(); // opacity is zero

			if (opts.fadeIn) {

				var cb = opts.onBlock ? opts.onBlock : noOp;

				var cb1 = (opts.showOverlay && !msg) ? cb : noOp;

				var cb2 = msg ? cb : noOp;

				if (opts.showOverlay)

					lyr2._fadeIn(opts.fadeIn, cb1);

				if (msg)

					lyr3._fadeIn(opts.fadeIn, cb2);

			}

			else {

				if (opts.showOverlay)

					lyr2.show();

				if (msg)

					lyr3.show();

				if (opts.onBlock)

					opts.onBlock();

			}

			// bind key and mouse events

			bind(1, el, opts);

			if (full) {

				pageBlock = lyr3[0];

				pageBlockEls = $(':input:enabled:visible',pageBlock);

				if (opts.focusInput)

					setTimeout(focus, 20);

			}

			else

				center(lyr3[0], opts.centerX, opts.centerY);

			if (opts.timeout) {

				// auto-unblock

				var to = setTimeout(function() {

					if (full)

						$.unblockUI(opts);

					else

						$(el).unblock(opts);

				}, opts.timeout);

				$(el).data('blockUI.timeout', to);

			}

		}

		// remove the block

		function remove(el, opts) {

			var full = (el == window);

			var $el = $(el);

			var data = $el.data('blockUI.history');

			var to = $el.data('blockUI.timeout');

			if (to) {

				clearTimeout(to);

				$el.removeData('blockUI.timeout');

			}

			opts = $.extend({}, $.blockUI.defaults, opts || {});

			bind(0, el, opts); // unbind events

			if (opts.onUnblock === null) {

				opts.onUnblock = $el.data('blockUI.onUnblock');

				$el.removeData('blockUI.onUnblock');

			}

			var els;

			if (full) // crazy selector to handle odd field errors in ie6/7

				els = $('body').children().filter('.blockUI').add('body > .blockUI');

			else

				els = $el.find('>.blockUI');

			// fix cursor issue

			if ( opts.cursorReset ) {

				if ( els.length > 1 )

					els[1].style.cursor = opts.cursorReset;

				if ( els.length > 2 )

					els[2].style.cursor = opts.cursorReset;

			}

			if (full)

				pageBlock = pageBlockEls = null;

			if (opts.fadeOut) {

				els.fadeOut(opts.fadeOut);

				setTimeout(function() { reset(els,data,opts,el); }, opts.fadeOut);

			}

			else

				reset(els, data, opts, el);

		}

		// move blocking element back into the DOM where it started

		function reset(els,data,opts,el) {

			els.each(function(i,o) {

				// remove via DOM calls so we don't lose event handlers

				if (this.parentNode)

					this.parentNode.removeChild(this);

			});

			if (data && data.el) {

				data.el.style.display = data.display;

				data.el.style.position = data.position;

				if (data.parent)

					data.parent.appendChild(data.el);

				$(el).removeData('blockUI.history');

			}

			if (typeof opts.onUnblock == 'function')

				opts.onUnblock(el,opts);

			// fix issue in Safari 6 where block artifacts remain until reflow

			var body = $(document.body), w = body.width(), cssW = body[0].style.width;

			body.width(w-1).width(w);

			body[0].style.width = cssW;

		}

		// bind/unbind the handler

		function bind(b, el, opts) {

			var full = el == window, $el = $(el);

			// don't bother unbinding if there is nothing to unbind

			if (!b && (full && !pageBlock || !full && !$el.data('blockUI.isBlocked')))

				return;

			$el.data('blockUI.isBlocked', b);

			// don't bind events when overlay is not in use or if bindEvents is false

			if (!opts.bindEvents || (b && !opts.showOverlay))

				return;

			// bind anchors and inputs for mouse and key events

			var events = 'mousedown mouseup keydown keypress touchstart touchend touchmove';

			if (b)

				$(document).bind(events, opts, handler);

			else

				$(document).unbind(events, handler);

		// former impl...

		//		var $e = $('a,:input');

		//		b ? $e.bind(events, opts, handler) : $e.unbind(events, handler);

		}

		// event handler to suppress keyboard/mouse events when blocking

		function handler(e) {

			// allow tab navigation (conditionally)

			if (e.keyCode && e.keyCode == 9) {

				if (pageBlock && e.data.constrainTabKey) {

					var els = pageBlockEls;

					var fwd = !e.shiftKey && e.target === els[els.length-1];

					var back = e.shiftKey && e.target === els[0];

					if (fwd || back) {

						setTimeout(function(){focus(back);},10);

						return false;

					}

				}

			}

			var opts = e.data;

			var target = $(e.target);

			if (target.hasClass('blockOverlay') && opts.onOverlayClick)

				opts.onOverlayClick();

			// allow events within the message content

			if (target.parents('div.' + opts.blockMsgClass).length > 0)

				return true;

			// allow events for content that is not being blocked

			return target.parents().children().filter('div.blockUI').length === 0;

		}

		function focus(back) {

			if (!pageBlockEls)

				return;

			var e = pageBlockEls[back===true ? pageBlockEls.length-1 : 0];

			if (e)

				e.focus();

		}

		function center(el, x, y) {

			var p = el.parentNode, s = el.style;

			var l = ((p.offsetWidth - el.offsetWidth)/2) - sz(p,'borderLeftWidth');

			var t = ((p.offsetHeight - el.offsetHeight)/2) - sz(p,'borderTopWidth');

			if (x) s.left = l > 0 ? (l+'px') : '0';

			if (y) s.top  = t > 0 ? (t+'px') : '0';

		}

		function sz(el, p) {

			return parseInt($.css(el,p),10)||0;

		}

	}

	/*global define:true */

	if (typeof define === 'function' && define.amd && define.amd.jQuery) {

		define(['jquery'], setup);

	} else {

		setup(jQuery);

	}

})();