<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>输出Hello World</title>
<head>
<script type="text/javascript">
 var txt = "";
 try{
    adddlert("Wellcome guest~");
 }catch(err){ 
     txt="此页面存在一个错误。\n\n" ;
     txt+="错误描述: " + err.message + "\n\n";
     txt+="点击“确定”继续。\n\n";
     alert(txt); 
 } 
</script>
</head>

<body> 
</body>

</html>