window.onerror = function(sMessage,sUrl,sLine)
{
    var err = "";
    err += "错误信息:" + sMessage + "\n";
    err += "错误文件:" + sUrl + "\n";
    err += "错误行数:" + sLine + "\n";
    alert(err);
}
throw new Error("出错啦！");
document.write("mzwu.com");

window.onerror = function(){return true;}

try{
    alert(ok);
}catch(e){
    var msg = "";
    msg += "错误类型(文本):" + e.name + "\n";
    msg += "错误类型(数字):" + e.number + "\n";
    msg += "错误信息:" + e.message + "\n";
    msg += "错误信息:" + e.description + "\n";
    alert(msg);
}
document.write("mzwu.com");