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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>try...catch语句</title>
</head>
<body>
<input type="button" value="查看消息" onclick="message()" />
</body>
</html>
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var txt=""
function message(){
try{
adddlert("Welcome guest!");
}
catch(err){
txt="本页有一个错误。\n\n";
txt+="错误描述:" + err.message+"\n\n";
txt+="点击确定继续。\n\n";
alert(txt);
输入 CSS 代码……