<html>
<head>
<script>
var txt="";
function message()
{
try
{
adddlert("Welcome guest!");
}
catch(err)
{
txt="There was an error on this page.\n\n";
txt+="Click OK to continue viewing this page,\n";
txt+="or Cancel to return to the home page.\n\n";
if(!confirm(txt))
{
document.location.href="http://www.ziqiangxuetang.com/";
}
}
}
</script>
</head>
<body>
<input type="button" value="View message" onclick="message()">
</body>
</html>