近来网上经常流传一些关于如何在父窗口控制只弹出一个子窗口 问题我查看了一些大部分都是只能解决部分或者很麻烦还不算完美。比如有人是实现的这样使用的是Cookie以下是例子。
主页上做了一个弹出窗口如何使其只弹出一次返回主页时不再弹出了。
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<script>
window.open("http://www.yeboss.com.cn","yeboss","width=300,height=400")
</script>
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cookie
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<HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var expDays = 1; // number of days the cookie should last
var page = "only-popup-once.html";
var windowprops = "width=300,height=200,location=no,toolbar=no,menubar=no,scrollbars=no,resizable=yes";
function GetCookie (name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break;
}
return null;
}
function SetCookie (name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}
function DeleteCookie (name) {
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name);
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
function amt(){
var count = GetCookie(count)
if(count == null) {
SetCookie(count,1)
return 1
}
else {
var newcount = parseInt(count) + 1;
DeleteCookie(count)
SetCookie(count,newcount,exp)
return count
}
}
function getCookieVal(offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function checkCount() {
var count = GetCookie(count);
if (count == null) {
count=1;
SetCookie(count, count, exp);
window.open(page, "", windowprops);
}
else {
count++;
SetCookie(count, count, exp);
}
}
// End -->
</script>
<BODY OnLoad="checkCount()">
这个是网上随便摘的一个例子是不是感觉很多也很难看懂呢下面我给大家说一种新方法保证好看好使。
<script language="JavaScript" type="text/JavaScript">
<!-- Copyright fenggang at 2007/3/23
var w=null;
function MM_openBrWindow(theURL,winName,features) { //v2.0
if(w!=undefined&&isOpen()){
w.close();
}
w=window.open("",winName,features);
w.location.replace(theURL);
}
function isOpen()
{
try
{
w.document;
return true;
}
catch(ex)
{}
return false;
}
//-->
</script>
这个MM_openBrWindow函数名是在Dreamweaver中常用的弹出窗口函数名将这段代码放进页面里
然后再做弹出窗口就只能探出一个窗口了以上是精髓部分下面是完整的一个测试页的代码试试看吧。
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!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=gb2312" />
<title>无标题文档</title>
<script language="JavaScript" type="text/JavaScript">
<!-- Copyright fenggang at 2007/3/23
var w=null;
function MM_openBrWindow(theURL,winName,features) { //v2.0
if(w!=undefined&&isOpen()){
w.close();
}
w=window.open("",winName,features);
w.location.replace(theURL);
}
function isOpen()
{
try
{
w.document;
return true;
}
catch(ex)
{}
return false;
}
//-->
</script>
</head>
<body>
<a href="javascript:;" onClick="MM_openBrWindow(show.asp,,scrollbars=yes,resizable=yes,width=570,height=500)">title</a>
</body>
</html>