try/catch

时间 2020-08-03

标签 try catch 繁體版

原文原文链接

1.try/catchjavascript

<html>
<head>
<script type="text/javascript">
var txt=""
function message()
{
try
   {
   adddlert("Welcome guest!")
   }
catch(err)
   {
   txt="本页中存在错误。\n\n"
   txt+="错误描述：" + err.description + "\n\n"
   txt+="点击“肯定”继续。\n\n"
   alert(txt)
   }
}
</script>
</head>html

<body>
<input type="button" value="查看消息" />
</body>java

</html>
ide

2.带有确认框的try/catchhtm

<html>
<head>
<script type="text/javascript">
var txt=""
function message()
{
try
   {
   adddlert("Welcome guest!")
   }
catch(err)
   {
     txt="本页中存在错误。\n\n"
     txt+="点击“肯定”继续查看本页，\n"
     txt+="点击“取消”返回首页。\n\n"
     if(!confirm(txt))
         {
         document.location.href="/index.html"
         }
   }
}
</script>
</head>ip

<body>
<input type="button" value="查看消息" />
</body>input

</html>
it