Use the Javascript parent window to control only one child window

Last Update:2018-12-08 Source: Internet

Author: User

Tags setcookie

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Recently, some questions about how to control a child window in the parent window are frequently circulated on the Internet. I have checked some questions about how to control the child window in the parent window. Most of them can only solve some or very troublesome issues, but they are not perfect. For example, a cookie is used. The following is an example.

A pop-up window is made on the home page. How to make it only pop up once is not displayed when you return to the home page.

---------------------------------------------------------------

<SCRIPT>

Window. Open ("http://www.yeboss.com.cn", "yeboss", "width = 300, Height = 400 ")

</SCRIPT>

---------------------------------------------------------------

Cookie

---------------------------------------------------------------

<Head>

<! -- Begin

VaR expdays = 1; // Number of days the cookie shocould 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 an example taken on the Internet. Is it difficult to understand many of them? I will introduce a new method to you to make sure it looks good.

<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.doc ument;

Return true;

}

Catch (Ex)

{}

Return false;

}

// -->

</SCRIPT>

The mm_openbrwindow () function name is a common pop-up window function name in Dreamweaver. Code Put in the page

Then, you can only find one window in the pop-up window. The above is the essence. below is the code of a complete test page. 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">

<HTML xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<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.doc ument;

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>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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