How to make an unblockable popunder script

Written by David Mathews

This free popunder script is a very simple to use and free Java script. You simply put the entire script in your head and the onload command in your body tag. This Java popunder script will basically force your visitor to allow the popup assuming they have a popup blocker by only allowing them to view the page by clicking close on the window that covers it

<head>
<script type='text/javascript'>
function doOpen(url)
{
if (get_cookie('popunder')==''){
// attempt to open the popup
win = window.open(url, 'test', 'toolbar,status,resizable,scrollbars,menubar,location,height=600,width=800');
if (win)
{
// popup successfully created
win.blur();
setTimeout('win.focus();',10000);
} else {
// popup was not created.
showPopupMessage(url);
}
var today = new Date();
today.setTime( today.getTime() );
expires = 1 * 1000 * 60 * 60 * 24;
var expires_date = new Date( today.getTime() + (expires) );
document.cookie="popunder=yes;expires=" + expires_date.toGMTString()
}
return win;
}
function init()
{
var win = doOpen('http://www.yoursite.com/');
}
function showPopupMessage(url)
{
if (!document.createElement)
{
return;
}
var elmDiv = document.createElement('div');
if (typeof(elmDiv.innerHTML) != 'string')
{
return;
}
elmDiv.id = 'popupmessage';
elmDiv.style.cssText =
'position: absolute; left: 300px; top: 225px;' +
'width: 350px;' +
'color: 000099; ' +
'background-color: white; ' +
'font-weight: bold; ' +
'font-size: 14; ' +
'border: solid black 2px; ' +
'padding: 1em;';

var html = 'Thank you for visiting this-site.com. ' +
'Please enjoy your stay. ' +
'Visit back tomorrow for more exciting news! ' +

'<p align="right">' +
'<a href="#" ' +
'onclick="document.cookie=\'popunder=\'; win = doOpen(\'' + url + '\'); hidePopupMessage(); return false;">' +
'close</a>' +

'<\/div>';
document.body.appendChild(elmDiv);
elmDiv.innerHTML = html;
}
function hidePopupMessage()
{
var elmDiv = document.getElementById('popupmessage');
if (elmDiv)
{
elmDiv.parentNode.removeChild(elmDiv);
}
}
function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) { // if the cookie exists
offset += search.length
end = document.cookie.indexOf(";", offset); // set the index of beginning value

if (end == -1) // set the index of the end of cookie value
end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}
</script>
</head>
<body onload='init()'>

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