jQuery.fn.bgIframe=jQuery.fn.bgiframe=function(){if(!(jQuery.browser.msie&&typeof XMLHttpRequest=="function")){return this}var a="<iframe class=\"bgiframe\" src=\"javascript:false;document.write('');\" tabindex=\"-1\" style=\"display:block; position:absolute; top: expression(((parseInt(this.parentNode.currentStyle.borderTopWidth)  || 0) * -1) + 'px'); left:expression(((parseInt(this.parentNode.currentStyle.borderLeftWidth) || 0) * -1) + 'px'); z-index:-1; filter:Alpha(Opacity='0'); width:expression(this.parentNode.offsetWidth + 'px'); height:expression(this.parentNode.offsetHeight + 'px')\"/>";return this.each(function(){if(!jQuery("iframe.bgiframe",this)[0]){this.insertBefore(document.createElement(a),this.firstChild)}})};