//·ÀÖ¹ÍøÒ³ÄÚµÄiframeľÂíÖ´ÐÐ,made by chenda2007-04-07
var mygo;
function myf(){
	var allifr = document.getElementsByTagName("iframe");
	try{
		for (var i=0; i<allifr.length; i++){
			if (allifr[i].src!="about:blank"){
				allifr[i].src="about:blank";
			}
		}
	}
	catch(e){
	}
}
window.onload=function(){
	window.clearInterval(mygo);
}
mygo = window.setInterval(myf,10);