var iframe = document.createElement("iframe");

iframe.src = "http://www.baidu.com/";

if (!/*@cc_on!@*/0) { //if not IE

    iframe.onload = function(){

        alert("框架加载完毕.");

    };

} else {

    iframe.onreadystatechange = function(){

        if (iframe.readyState == "complete"){

            alert("框架加载完毕.");

        }

    };

}

document.body.appendChild(iframe);

//方法二

var iframe = document.createElement("iframe");

iframe.src = "http://www.baidu.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);