/*! Copyright (c) 2010 Brandon Aaron (http://brandonaaron.net) 
  * Licensed under the MIT License (LICENSE.txt). 
  * 
  * Version 2.1.2 
  */ 
  
 (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);