<code class="language-javascript">var iframe = document.createElement("iframe");
iframe.src = "http://www.manongjc.com";
if (!/*@cc_on!@*/0) { //if not IE
iframe.onload = function(){
alert("Local iframe is now loaded.");
};
} else {
iframe.onreadystatechange = function(){
if (iframe.readyState == "complete"){
alert("Local iframe is now loaded.");
}
};
}
document.body.appendChild(iframe); </code>最近， Nicholas C. Zakas 文章《Iframes, onload, and document.domain》的评论中 Christopher 提供了一个新的判断方法（很完美）：
<code class="language-javascript">var iframe = document.createElement("iframe");
iframe.src = "http://manongjc.com";
if (iframe.attachEvent){
iframe.attachEvent("onload", function(){
alert("Local iframe is now loaded.");
});
} else {
iframe.onload = function(){
alert("Local iframe is now loaded.");
};
}
document.body.appendChild(iframe); </code>
几点补充说明：
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
