带有确认框的 try...catch 语句

<!DOCTYPE html>
<html>
<head> 
<meta charset="utf-8"> 
<title>滴答编程(dida100.com)</title> 
<script>
var txt="";
function message(){
	try{
		adddlert("Welcome guest!");
	}
	catch(err){
		txt="本页有一个错误。\n\n";
		txt+="单击确定继续跳转\n";	
		txt+="或者单击取消返回\n\n";
		if(confirm(txt)){
			document.location.href="http://www.dida100.com/";
		}
	}
}
</script>
</head>

<body>
<input type="button" value="查看消息" onclick="message()" />
</body>

</html>