点击关闭按钮执行一串代码有关问题
日期：2014-05-18 浏览次数：20690 次
点击关闭按钮执行一串代码问题
我希望在只在关闭该页面的时候执行function window.onunload()，为什么在刚打开这个页面时也执行function window.onunload() ?
该页面代码如下：
<HTML>
<HEAD>
<%@ page
language= "java "
contentType= "text/html; charset=GBK "
pageEncoding= "GBK "
%>
<META http-equiv= "Content-Type " content= "text/html; charset=GBK ">
<title> 聊天室 </title>
<%@ page import = "StudyBbs.* " %>
<%@ page import = "java.util.* " %>
<%
String Name =(String) session.getAttribute( "username ");
%>
<script language= "javascript ">
function window.onunload()
{
<%
String Name1 =(String) session.getAttribute( "username ");
Vector ListUser=null;
ListUser =(Vector)application.getAttribute( "UserName ");
ListUser.remove(Name1);
out.print( "alert(\ "您已退出聊天室!\ "); ");
System.out.println( "error ");
%>
}
</script>
</head>
<frameset rows = "*,100 " >
<frameset cols = "*,150 " >
<frame src = "show.jsp " name= "mainFrame " scrolling= "auto ">
<frameset rows = "80,*,0 " >
<frame name = "image " src= "image.htm ">
<frame name = "userlistFrame " src= "userlist.jsp ">
<frame name = "hiddenFrame " src= "transact.jsp ">
</frameset>
</frameset>
<frame src= "input.jsp?username= <%= Name %> " name= "inputFrame ">
</frameset>
<noframes>
<body bgcolor= "#FFFFFF " >
您的浏览器不支持框架，对不起！
</body >
</noframes>
</html>
------解决方案--------------------
http://bbs.51js.com/viewthread.php?tid=67863
我希望在只在关闭该页面的时候执行function window.onunload()，为什么在刚打开这个页面时也执行function window.onunload() ?
该页面代码如下：
<HTML>
<HEAD>
<%@ page
language= "java "
contentType= "text/html; charset=GBK "
pageEncoding= "GBK "
%>
<META http-equiv= "Content-Type " content= "text/html; charset=GBK ">
<title> 聊天室 </title>
<%@ page import = "StudyBbs.* " %>
<%@ page import = "java.util.* " %>
<%
String Name =(String) session.getAttribute( "username ");
%>
<script language= "javascript ">
function window.onunload()
{
<%
String Name1 =(String) session.getAttribute( "username ");
Vector ListUser=null;
ListUser =(Vector)application.getAttribute( "UserName ");
ListUser.remove(Name1);
out.print( "alert(\ "您已退出聊天室!\ "); ");
System.out.println( "error ");
%>
}
</script>
</head>
<frameset rows = "*,100 " >
<frameset cols = "*,150 " >
<frame src = "show.jsp " name= "mainFrame " scrolling= "auto ">
<frameset rows = "80,*,0 " >
<frame name = "image " src= "image.htm ">
<frame name = "userlistFrame " src= "userlist.jsp ">
<frame name = "hiddenFrame " src= "transact.jsp ">
</frameset>
</frameset>
<frame src= "input.jsp?username= <%= Name %> " name= "inputFrame ">
</frameset>
<noframes>
<body bgcolor= "#FFFFFF " >
您的浏览器不支持框架，对不起！
</body >
</noframes>
</html>
------解决方案--------------------
http://bbs.51js.com/viewthread.php?tid=67863
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