原文地址：http://blog.ops.cc/webtech/javascript/f5nhm.html
<body>
<script>var iframe = document.createElement("IFRAME");
document.body.appendChild(iframe);
iframe.src = "http://www.ops.cc";
if (iframe.attachEvent) {
iframe.attachEvent("onload", function () {
alert("Local iframe is now loaded.");
});
} else {
iframe.onload = function () {
alert("Local iframe is now loaded.");
};
}
</script>
</body>
原文：http://www.cnblogs.com/wangjunwei/p/4294243.html