http://dev.firnow.com/course/1_web/javascript/jsjs/200855/113518.html
window.open
文章出处：飞诺网(www.firnow.com):http://dev.firnow.com/course/1_web/javascript/jsjs/200855/113518.html
if (xxx && xxx.open && !xxx.closed)
{
//页面已经打开~~~~
}
else
{
xxx = window.open....
}
<script>
var xxx;
function clickHref()
{
if (xxx && xxx.open && !xxx.closed)
{
return;
}
xxx = window.open( "2.htm ");
document.all.aaa.style.display = "none ";
}
function ajax()
{
//取信息状态
.............
if (xxx && xxx.open && !xxx.closed)
{
//隐藏信息
document.all.aaa.style.display = "none ";
}
else
{
//显示新信息
document.all.aaa.style.display = " ";
}
setInterval( 'ajax() ',1000);
}
</script>
<form id= "form1 " onload= "ajax() ">
<a name= "aaa " href= "# " onclick= "clickHref() " target= "_self "> 信息 </a>
</form>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>打开指定URL的窗口/改变链接时候状态栏的文字</title>
<script language="javascript">
//申明一个代表窗体对象的变量，这是关键，他作为全局变量，后面两个函数都可以访问他
var SunWindows;
function newWindow(url)
{//这里申明一个根据传来的地址打开新窗口的函数
if (SunWindows&&SunWindows.open&&SunWindows.closed)
{
return;
}
SunWindows=window.open(url,"","width=400,height=300,left=200,top=200");//将打开的窗口对象作为值赋给SunWindows对象
}
function closeWind()
{
//关闭打开的新窗口，否则提示
if(SunWindows)//如果SunWindows对象存在
{
SunWindows.close();//调用关闭方法
SunWindows=null//并把值赋成null
}
else
{
//alert("没有打开的窗口");
}
}
</script>
</head>
<body onunload="closeWind();">
<p>
<input type="submit" name="tijiao" value="打开fengyan博客" onclick="newWindow('http://eflylab.cnblogs.com')" />
打开博客后，关闭本窗体。打开的子窗体会自动关闭
</p>
<p>
<input type="submit" name="close" value="直接在本窗体中关闭刚才打开的窗口" onclick="closeWind()" />
</p>
<p><a href="http://eflylab.cnblogs.com" >http://eflylab.cnblogs.com</p>
</body>
</html>
http://www.cnblogs.com/eflylab/archive/2008/06/06/1215166.html
Definition and Usage
定义与用法
The onunload event occurs when a user exits a page.
当用户关闭一个页面时触发 onunload 事件。
Syntax
语法
onunload="SomeJavaScriptCode" |
| Parameter 参数 | Description 描述 |
|---|---|
| SomeJavaScriptCode JavaScript脚本 | Required. Specifies a JavaScript to be executed when the event occurs. 必选项目。当事件被触发 
mikebai This person is a lazy dog and has left nothing |