自动调整iframe的高度

                            <iframe src="<%=strReturnURL %>" ></iframe>

                            <script type="text/javascript">
function reinitIframe(){
var iframe = document.getElementById("frame_content");
try{
iframe.height=iframe.contentWindow.document.documentElement.scrollHeight;
}catch (ex){}
}
window.setInterval("reinitIframe()", 200);
                            </script>