JavaScript Dirty Popup Windows

Dirty Popup
This script is really mean and dirty! Put it into your web page and the script automatically opens a popup-window. When you try to close this popup-window two more popup-windows appear. Try to close these windows and four new popup-windows appear and so on. No panic! After displaying a certain (adjustable) amount of popup-windows the script stops creating new popups and you may close the windows. Easy installation and configuration. IE4+,NN6+. Try to close the red window in order to test the script. We set our maximum popups at 7 for demo purposes.

Configuration:

Step 1: Open your web page. Paste the following into the <head> section:

<SCRIPT>
// CREDITS:
// Dirty Popup by Urs Dudli and Peter Gehrig 
// Copyright (c) 2000 Peter Gehrig and Urs Dudli. All rights reserved.
// Permission given to use the script provided that this notice remains as is.
// Additional scripts can be found at http://www.24fun.com.
// info@24fun.com
// 11/15/2001

// IMPORTANT: 
// If you add this script to a script-library or script-archive 
// you have to add a link to http://www.24fun.com on the webpage 
// where this script will be running.

//////////////////////////////////////////////////////////////////
// CONFIGURATION STARTS HERE
//////////////////////////////////////////////////////////////////

// the URL of the webpage that will be displayed in the popupwindow
var popupurl="http://www.anydomain/anypage.html"

// the width of the popup-window (pixels)
var popupwidth=180

// the height of the popup-window (pixels)
var popupheight=120

// Configure here how many popups shall appear before the script stops
// creating new ones
// ATTENTION: a high number might crash the PC of your visitors
var maximumpopups=4

//////////////////////////////////////////////////////////////////
// CONFIGURATION ENDS HERE
//////////////////////////////////////////////////////////////////

// do not edit the code below this line
var countpopups=0
var ns6=document.getElementById&&!document.all?1:0 
var ie=document.all?1:0

function startpopup() {
    if (ns6 || ie) {
        countpopups=0
        var popuptop=Math.floor(400*Math.random())  
        var popupleft=Math.floor(600*Math.random())
        window.open(popupurl, "", "toolbar=no,width="+popupwidth+",height="+popupheight+",top="+popuptop+",left="+popupleft+"");
    }
}

Step 2: Open the web page. Go to the top of the script-code and configure the height and the width of the popup-window as well as the URL of the web page that will be displayed in the popup-window.

Step 3: Open the web page that is going to be displayed in your popups. Paste the following red code right INTO the <body> tag of your web page:
<body onUnload="opener.openpopup()">

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