Recently on the Internet a lot about how to control in the parent window only a child window problem, I looked at some, most of them can only be solved part or very troublesome, not perfect. For example, someone is implementing this, using a cookie, and here's an example.
The home page has a pop-up window, how to make it pop only once, return to the home page no longer pop-up.
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<script>
window.open ("http://www.yeboss.com.cn", "Yeboss", "width=300,height=400")
</script>
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Cookies
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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 ()" >
This is the Internet casually picked an example, is not a lot of it is difficult to understand, I would like to say a new method, to ensure good looks.
<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>
This Mm_openbrwindow () function name is the pop-up function name that is commonly used in Dreamweaver, and this code is put into the page
Then do pop-up windows can only explore a window, the above is the essence of the section, the following is a complete test page code, try it.
<% @LANGUAGE = "VBSCRIPT" codepage= "936"%>
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; charset=gb2312 "/>
<title> Untitled Document </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>
<body>
<a href= "javascript:;" onclick= "Mm_openbrwindow" (show.asp,,scrollbars=yes,resizable=yes,width=570,height= ) ">title</a>
</body>
