/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net) 
* Licensed under the MIT License (LICENSE.txt). 
* 
* Version 2.1.3-pre */

(function($){

$.fn.bgiframe = ($.browser.msie && /msie 6\.0/i.test(navigator.userAgent) ? function(s) {    
s = $.extend({        
top     : 'auto', // auto == .currentStyle.borderTopWidth        
left    : 'auto', // auto == .currentStyle.borderLeftWidth        
width   : 'auto', // auto == offsetWidth        
height  : 'auto', // auto == offsetHeight        
opacity : true,        src     : 'javascript:false;'    }, s);   
 var html = '<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+                   
 'style="display:block;position:absolute;z-index:-1;'+                       
 (s.opacity !== false?'filter:Alpha(Opacity=\'0\');':'')+                       
 'top:'+(s.top=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)||0)*-1)+\'px\')':prop(s.top))+';'+                       
 'left:'+(s.left=='auto'?'expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth)||0)*-1)+\'px\')':prop(s.left))+';'+                       
 'width:'+(s.width=='auto'?'expression(this.parentNode.offsetWidth+\'px\')':prop(s.width))+';'+                       
 'height:'+(s.height=='auto'?'expression(this.parentNode.offsetHeight+\'px\')':prop(s.height))+';'+                
 '"/>';    
 return this.each(function() {        
 if ( $(this).children('iframe.bgiframe').length === 0 )            
 this.insertBefore( document.createElement(html), this.firstChild );    
 });
 } : function() { return this; });
 // old alias
 $.fn.bgIframe = $.fn.bgiframe;

 function prop(n) {
     return n && n.constructor === Number ? n + 'px' : n;
 }
 })(jQuery);