tryjs_onerror 在线代码实例

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运行代码

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<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>W3Cschool教程(w3cschool.cn)</title> 
<script>
onerror=handleErr;
var txt="";
function handleErr(msg,url,l){
    txt="该页面有一个错误\n\n";
    txt+="错误: " + msg + "\n";
    txt+="URL: " + url + "\n";
    txt+="行: " + l + "\n\n";
    txt+="点击确定继续。\n\n";
    alert(txt);
    return true;
}
function message(){
    adddlert("Welcome guest!");
}
</script>
</head>
<body>
<input type="button" value="查看消息" onclick="message()" />
</body>
</html>
 
 
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运行结果
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