iframe 刷新

 <iframe id="frame_content" src="iframe_b.html" scrolling="no" frameborder="0" onload="this.height=100"></iframe>

 <script type="text/javascript">

 function reinitIframe(){

var iframe = document.getElementById("frame_content");

 try{

 var bHeight = iframe.contentWindow.document.body.scrollHeight;

 var dHeight = iframe.contentWindow.document.documentElement.scrollHeight;

var height = Math.max(bHeight, dHeight);

 iframe.height = height;

 }catch (ex){}

}