ThickBox 3.1
developed by Cody Lindley, using jQuery, last updated on 08/08/2007
ThickBox is a webpage UI dialog widget written in JavaScript on top of the jQuery library. Its function is to show a single image, multiple images, inline content, iframed content, or content served through AJAX in a hybrid modal.
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Overview
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Features:
ThickBox was built using the super lightweight jQuery library. Compressed, the jQuery library is 20k, uncompressed it's 58k.
The ThickBox JavaScript code and CSS file only add an additional 15k (only 10k by using the thickbox-compressed.js) on top of the jQuery code. The CSS file could additionally be compressed if need be. 
ThickBox will resize images that are bigger than the browser window.
ThickBox offers versatility (images, iframed content, inline content, and AJAX content).
ThickBox will hide form elements in Windows IE 6.
ThickBox will remain centered in the window even when the user scrolls the page or changes the size of the browser window. Clicking an image, the overlay, or close link will remove ThickBox.
Due to the ThickBox creator's view that transitions should be tailored by individual authors, ThickBox windows do not implement fancy transitions. Feel free to add them as you see fit. Is this a feature? Well, some might say it is. 
ThickBox can be invoked from a link element, input element (typically a button), and the area element (image maps).
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code
css
gif
compressed code
/* ----------------------------------------------------------------------------------------------------------------*/
/* ---------->>> global settings needed for thickbox <<<-----------------------------------------------------------*/
/* ----------------------------------------------------------------------------------------------------------------*/
*{padding: 0; margin: 0;}
/* ----------------------------------------------------------------------------------------------------------------*/
/* ---------->>> thickbox specific link and font settings <<<------------------------------------------------------*/
/* ----------------------------------------------------------------------------------------------------------------*/
#TB_window {
  font: 12px Arial, Helvetica, sans-serif;
  color: #333333;
}
#TB_secondLine {
  font: 12px Arial, Helvetica, sans-serif;
  font-weight:bold;
  color:#666666;
}

#close{float:right;margin:5px 15px;}

#TB_selected{background:#CCCCCC; color:white; padding:2px}
#TB_window a:link {color: #666666;}
#TB_window a:visited {color: #666666;}
#TB_window a:hover {color: #000;}
#TB_window a:active {color: #666666;}
#TB_window a:focus{color: #666666;}
/* ----------------------------------------------------------------------------------------------------------------*/
/* ---------->>> thickbox settings <<<-----------------------------------------------------------------------------*/
/* ----------------------------------------------------------------------------------------------------------------*/
#TB_overlay {
  position: fixed;
  z-index:100;
  top: 0px;
  left: 0px;
  height:100%;
  width:100%;
}
.TB_overlayMacFFBGHack {background: url(macFFBgHack.png) repeat;}
.TB_overlayBG {
  background-color:#000;
  filter:alpha(opacity=75);
  -moz-opacity: 0.75;
  opacity: 0.75;
}
* html #TB_overlay { /* ie6 hack */
     position: absolute;
     height: expression(document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + 'px');
}
#TB_window {
  position: fixed;
  background: #ffffff;
  z-index: 102;
  color:#000000;
  display:none;
  border: 4px solid #525252;
  text-align:left;
  top:50%;
  left:50%;
}
* html #TB_window { /* ie6 hack */
position: absolute;
margin-top: expression(0 - parseInt(this.offsetHeight / 2) + (TBWindowMargin = document.documentElement && document.documentElement.scrollTop || document.body.scrollTop) + 'px');
}
#TB_window img#TB_Image {
  display:block;
  margin: 25px 0 0 15px;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  border-top: 1px solid #666;
  border-left: 1px solid #666;
}
#TB_caption{
  height:25px;
  padding:10px 20px;
  width:100%;
  text-align:center;
}
#TB_closeWindow{
  height:25px;
  padding:0 20px 0 0;
  float:right;
}
#TB_closeAjaxWindow{
  padding:7px 10px 5px 0;
  margin-bottom:1px;
  text-align:right;
  float:right;
}
#TB_ajaxWindowTitle{
  float:left;
  padding:7px 0 5px 10px;
  margin-bottom:1px;
}
#TB_title{
  background-color:#e8e8e8;
  height:27px;
}
#TB_ajaxContent{
  clear:both;
  padding:2px 15px 15px 15px;
  overflow:auto;
  text-align:left;
  line-height:1.4em;
}
#TB_ajaxContent.TB_modal{
  padding:15px;
}
#TB_ajaxContent p{
  padding:5px 0px 5px 0px;
}
#TB_load{
  position: fixed;
  display:none;
  height:13px;
  width:208px;
  z-index:103;
  top: 50%;
  left: 50%;
  margin: -6px 0 0 -104px; /* -height/2 0 0 -width/2 */
}
* html #TB_load { /* ie6 hack */
position: absolute;
margin-top: expression(0 - parseInt(this.offsetHeight / 2) + (TBWindowMargin = document.documentElement && document.documentElement.scrollTop || document.body.scrollTop) + 'px');
}
#TB_HideSelect{
  z-index:99;
  position:fixed;
  top: 0;
  left: 0;
  background-color:#fff;
  border:none;
  filter:alpha(opacity=0);
  -moz-opacity: 0;
  opacity: 0;
  height:100%;
  width:100%;
}
* html #TB_HideSelect { /* ie6 hack */
     position: absolute;
     height: expression(document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + 'px');
}
#TB_iframeContent{
  clear:both;
  border:none;
  margin-bottom:-1px;
  margin-top:1px;
  _margin-bottom:1px;
}