判断iframe是否加载完毕
<head><meta http-equiv="Content-Type" c><title>新建网页 1</title></head><body> [align=center" style="position: absolute; width: 100px; height: 100px; z-index: 1; left:158px; top:17px" id="load][img]http://sysimages.tq.cn/images/analysis_images/ajax-loader.gif[/img] loading[/align]<iframe style="visibility:hidden" onreadystatechange=stateChangeIE(this) onload=stateChangeFirefox(this) name="callframe" id="callframe" width="420" height="100" frameborder="0" scrolling="no" marginheight="0"></iframe><script> function stateChangeIE(_frame) { if (_frame.readyState=="interactive")//state: loading ,interactive, complete { var loader = document.getElementById("load"); loader.innerHTML = ""; loader.style.display = "none"; _frame.style.visibility = "visible"; } } function stateChangeFirefox(_frame) { var loader = document.getElementById("load"); loader.innerHTML = ""; loader.style.display = "none"; _frame.style.visibility = "visible"; } callframe.location.href="http://www.hao123.com"; </script> </body></html>