EDIT

/*

 * Thickbox 3.1 - One Box To Rule Them All.

 * By Cody Lindley (http://www.codylindley.com)

 * Copyright (c) 2007 cody lindley

 * Licensed under the MIT License: http://www.opensource.org/licenses/mit-license.php

*/

var tb_pathToImage = "images/loadingAnimation.gif";

/*!!!!!!!!!!!!!!!!! edit below this line at your own risk !!!!!!!!!!!!!!!!!!!!!!!*/

//on page load call tb_init

$(document).ready(function(){   

	tb_init('a.thickbox, area.thickbox, input.thickbox');//pass where to apply thickbox

	imgLoader = new Image();// preload image

	imgLoader.src = tb_pathToImage;

});

//add thickbox to href & area elements that have a class of .thickbox

function tb_init(domChunk){

	$(domChunk).click(function(){

	var t = this.title || this.name || null;

	var a = this.href || this.alt;

	var g = this.rel || false;

	tb_show(t,a,g);

	this.blur();

	return false;

	});

}

function tb_show(caption, url, imageGroup) {//function called when the user clicks on a thickbox link

	try {

		if (typeof document.body.style.maxHeight === "undefined") {//if IE 6

			$("body","html").css({height: "100%", width: "100%"});

			$("html").css("overflow","hidden");

			if (document.getElementById("TB_HideSelect") === null) {//iframe to hide select elements in ie6

				$("body").append("<iframe id='TB_HideSelect'></iframe><div id='TB_overlay'></div><div id='TB_window'></div>");

				$("#TB_overlay").click(tb_remove);

			}

		}else{//all others

			if(document.getElementById("TB_overlay") === null){

				$("body").append("<div id='TB_overlay'></div><div id='TB_window'></div>");

				$("#TB_overlay").click(tb_remove);

			}

		}

		if(tb_detectMacXFF()){

			$("#TB_overlay").addClass("TB_overlayMacFFBGHack");//use png overlay so hide flash

		}else{

			$("#TB_overlay").addClass("TB_overlayBG");//use background and opacity

		}

		if(caption===null){caption="";}

		$("body").append("<div id='TB_load'><img src='"+imgLoader.src+"' /></div>");//add loader to the page

		$('#TB_load').show();//show loader

		var baseURL;

		if(url.indexOf("?")!==-1){ //ff there is a query string involved

			baseURL = url.substr(0, url.indexOf("?"));

		}else{ 

			baseURL = url;

		}

		var urlString = /\.jpg$|\.jpeg$|\.png$|\.gif$|\.bmp$/;

		var urlType = baseURL.toLowerCase().match(urlString);

		if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif' || urlType == '.bmp'){//code to show images

			var zoom = true;

			TB_PrevCaption = "";

			TB_PrevURL = "";

			TB_PrevHTML = "";

			TB_NextCaption = "";

			TB_NextURL = "";

			TB_NextHTML = "";

			TB_imageCount = "";

			TB_FoundURL = false;

			if(imageGroup){

				TB_TempArray = $("a[@rel="+imageGroup+"]").get();

				for (TB_Counter = 0; ((TB_Counter < TB_TempArray.length) && (TB_NextHTML === "")); TB_Counter++) {

					var urlTypeTemp = TB_TempArray[TB_Counter].href.toLowerCase().match(urlString);

						if (!(TB_TempArray[TB_Counter].href == url)) {						

							if (TB_FoundURL) {

								TB_NextCaption = TB_TempArray[TB_Counter].title;

								TB_NextURL = TB_TempArray[TB_Counter].href;

								TB_NextHTML = "<span id='TB_next'>&nbsp;&nbsp;<a href='#'>Next &gt;</a></span>";

							} else {

								TB_PrevCaption = TB_TempArray[TB_Counter].title;

								TB_PrevURL = TB_TempArray[TB_Counter].href;

								TB_PrevHTML = "<span id='TB_prev'><a href='#'>&lt; Prev</a>&nbsp;&nbsp;</span>";

							}

						} else {

							TB_FoundURL = true;

							TB_imageCount = (TB_Counter + 1) +"/"+ (TB_TempArray.length);											

						}

				}

			}

			imgPreloader = new Image();

			imgPreloader.onload = function(){		

			imgPreloader.onload = null;

			// Resizing large images - orginal by Christian Montoya edited by me.

			var pagesize = tb_getPageSize();

			var x = pagesize[0] - 150;

			var y = pagesize[1] - 150;

			var imageWidth = imgPreloader.width;

			var imageHeight = imgPreloader.height;

			if (imageWidth > x) {

				imageHeight = imageHeight * (x / imageWidth); 

				imageWidth = x; 

				if (imageHeight > y) { 

					imageWidth = imageWidth * (y / imageHeight); 

					imageHeight = y; 

				}

			} else if (imageHeight > y) { 

				imageWidth = imageWidth * (y / imageHeight); 

				imageHeight = y; 

				if (imageWidth > x) { 

					imageHeight = imageHeight * (x / imageWidth); 

					imageWidth = x;

				}

			}

			// End Resizing

			if(zoom){

				// viewport should be wider if zooming is enabled

				dx = (x - imageWidth)/1.5 ;

				imageWidth += dx;

			}

			TB_WIDTH = imageWidth + 30;

			TB_HEIGHT = imageHeight + 40;

			//$("#TB_window").append("<a href='' id='TB_ImageOff' title='Close'><img id='TB_Image' src='"+url+"' width='"+imageWidth+"' height='"+imageHeight+"' alt='"+caption+"'/></a>" + "<div id='TB_caption'>"+caption+"<div id='TB_secondLine'>" + TB_imageCount + TB_PrevHTML + TB_NextHTML + "</div></div><div id='TB_closeWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div>"); 		

			$("#TB_window").append(	"<img id='TB_Image' src='"+url+"' alt='"+caption+"'/>" 

									+ "<div id='TB_caption'>"+caption

										+"<div id='TB_secondLine'>" 

											+ TB_PrevHTML + TB_imageCount + TB_NextHTML 

										+ "</div>"

									+ "</div>"

									+ "<div id='TB_closeWindow'>"

										+ "<a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key"

									+ "</div>"); 		

			$("#TB_closeWindowButton").click(tb_remove);

			if(zoom){

				var imageToolOptions = {

					'viewportWidth' :  imageWidth,

					'viewportHeight' : imageHeight

				}				

				$("#TB_Image").imagetool(imageToolOptions);

				$("#TB_caption").after( "<div id='TB_zoom_instructions'>Click and drag to navigate. Ctrl-Click and drag to zoom.</div>" );

			}

			if (!(TB_PrevHTML === "")) {

				function goPrev(){

					if($(document).unbind("click",goPrev)){$(document).unbind("click",goPrev);}

					$("#TB_window").remove();

					$("body").append("<div id='TB_window'></div>");

					tb_show(TB_PrevCaption, TB_PrevURL, imageGroup);

					return false;	

				}

				$("#TB_prev").click(goPrev);

			}

			if (!(TB_NextHTML === "")) {		

				function goNext(){

					$("#TB_window").remove();

					$("body").append("<div id='TB_window'></div>");

					tb_show(TB_NextCaption, TB_NextURL, imageGroup);				

					return false;	

				}

				$("#TB_next").click(goNext);

			}

			document.onkeydown = function(e){ 	

				if (e == null) { // ie

					keycode = event.keyCode;

				} else { // mozilla

					keycode = e.which;

				}

				if(keycode == 27){ // close

					tb_remove();

				} else if(keycode == 190){ // display previous image

					if(!(TB_NextHTML == "")){

						document.onkeydown = "";

						goNext();

					}

				} else if(keycode == 188){ // display next image

					if(!(TB_PrevHTML == "")){

						document.onkeydown = "";

						goPrev();

					}

				}	

			};

			tb_position();

			$("#TB_load").remove();

			$("#TB_ImageOff").click(tb_remove);

			$("#TB_window").css({display:"block"}); //for safari using css instead of show

			};

			imgPreloader.src = url;

		}else{//code to show html

			var queryString = url.replace(/^[^\?]+\??/,'');

			var params = tb_parseQuery( queryString );

			TB_WIDTH = (params['width']*1) + 30 || 630; //defaults to 630 if no paramaters were added to URL

			TB_HEIGHT = (params['height']*1) + 40 || 440; //defaults to 440 if no paramaters were added to URL

			ajaxContentW = TB_WIDTH - 30;

			ajaxContentH = TB_HEIGHT - 45;

			if(url.indexOf('TB_iframe') != -1){// either iframe or ajax window		

					urlNoQuery = url.split('TB_');

					$("#TB_iframeContent").remove();

					if(params['modal'] != "true"){//iframe no modal

						$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton' title='Close'>close</a> or Esc Key</div></div><iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;' > </iframe>");

					}else{//iframe modal

					$("#TB_overlay").unbind();

						$("#TB_window").append("<iframe frameborder='0' hspace='0' src='"+urlNoQuery[0]+"' id='TB_iframeContent' name='TB_iframeContent"+Math.round(Math.random()*1000)+"' onload='tb_showIframe()' style='width:"+(ajaxContentW + 29)+"px;height:"+(ajaxContentH + 17)+"px;'> </iframe>");

					}

			}else{// not an iframe, ajax

					if($("#TB_window").css("display") != "block"){

						if(params['modal'] != "true"){//ajax no modal

						$("#TB_window").append("<div id='TB_title'><div id='TB_ajaxWindowTitle'>"+caption+"</div><div id='TB_closeAjaxWindow'><a href='#' id='TB_closeWindowButton'>close</a> or Esc Key</div></div><div id='TB_ajaxContent' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px'></div>");

						}else{//ajax modal

						$("#TB_overlay").unbind();

						$("#TB_window").append("<div id='TB_ajaxContent' class='TB_modal' style='width:"+ajaxContentW+"px;height:"+ajaxContentH+"px;'></div>");	

						}

					}else{//this means the window is already up, we are just loading new content via ajax

						$("#TB_ajaxContent")[0].style.width = ajaxContentW +"px";

						$("#TB_ajaxContent")[0].style.height = ajaxContentH +"px";

						$("#TB_ajaxContent")[0].scrollTop = 0;

						$("#TB_ajaxWindowTitle").html(caption);

					}

			}

			$("#TB_closeWindowButton").click(tb_remove);

			if(url.indexOf('TB_inline') != -1){	

				$("#TB_ajaxContent").append($('#' + params['inlineId']).children());

				$("#TB_window").unload(function () {

					$('#' + params['inlineId']).append( $("#TB_ajaxContent").children() ); // move elements back when you're finished

				});

				tb_position();

				$("#TB_load").remove();

				$("#TB_window").css({display:"block"}); 

			}else if(url.indexOf('TB_iframe') != -1){

				tb_position();

				if($.browser.safari){//safari needs help because it will not fire iframe onload

					$("#TB_load").remove();

					$("#TB_window").css({display:"block"});

				}

			}else{

				$("#TB_ajaxContent").load(url += "&random=" + (new Date().getTime()),function(){//to do a post change this load method

					tb_position();

					$("#TB_load").remove();

					tb_init("#TB_ajaxContent a.thickbox");

					$("#TB_window").css({display:"block"});

				});

			}

		}

		if(!params['modal']){

			document.onkeyup = function(e){ 	

				if (e == null) { // ie

					keycode = event.keyCode;

				} else { // mozilla

					keycode = e.which;

				}

				if(keycode == 27){ // close

					tb_remove();

				}	

			};

		}

	} catch(e) {

		//nothing here

	}

}

//helper functions below

function tb_showIframe(){

	$("#TB_load").remove();

	$("#TB_window").css({display:"block"});

}

function tb_remove() {

 	$("#TB_imageOff").unbind("click");

	$("#TB_closeWindowButton").unbind("click");

	$("#TB_window").fadeOut("fast",function(){$('#TB_window,#TB_overlay,#TB_HideSelect').trigger("unload").unbind().remove();});

	$("#TB_load").remove();

	if (typeof document.body.style.maxHeight == "undefined") {//if IE 6

		$("body","html").css({height: "auto", width: "auto"});

		$("html").css("overflow","");

	}

	document.onkeydown = "";

	document.onkeyup = "";

	return false;

}

function tb_position() {

$("#TB_window").css({marginLeft: '-' + parseInt((TB_WIDTH / 2),10) + 'px', width: TB_WIDTH + 'px'});

	if ( !(jQuery.browser.msie && jQuery.browser.version < 7)) { // take away IE6

		$("#TB_window").css({marginTop: '-' + parseInt((TB_HEIGHT / 2),10) + 'px'});

	}

}

function tb_parseQuery ( query ) {

   var Params = {};

   if ( ! query ) {return Params;}// return empty object

   var Pairs = query.split(/[;&]/);

   for ( var i = 0; i < Pairs.length; i++ ) {

      var KeyVal = Pairs[i].split('=');

      if ( ! KeyVal || KeyVal.length != 2 ) {continue;}

      var key = unescape( KeyVal[0] );

      var val = unescape( KeyVal[1] );

      val = val.replace(/\+/g, ' ');

      Params[key] = val;

   }

   return Params;

}

function tb_getPageSize(){

	var de = document.documentElement;

	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;

	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;

	arrayPageSize = [w,h];

	return arrayPageSize;

}

function tb_detectMacXFF() {

  var userAgent = navigator.userAgent.toLowerCase();

  if (userAgent.indexOf('mac') != -1 && userAgent.indexOf('firefox')!=-1) {

    return true;

  }

}