javascript实现iframe框架延时加载

<div id="indexlogin"></div>

<span id="tmpjsnews"><script type="text/javascript" src="你调用的js" language="javascript"></script></span>
<script type="text/javascript">document.getElementById("indexlogin").innerHTML=document.getElementById("tmpjsnews").innerHTML;</script>

 window.onload   =   function()      {        
 frames["BiframeName"].location.href   =   "B.htm";    
}

setTimeout(function(){
    var frame = document.createElement('IFAME');
frame.src = ' http://xxx.com';
    document.getElementById('container').appendChild(frame);
}, 60000);