Pop-under window

<script>

//Pop-under window II- By JavaScript Kit
//Credit notice must stay intact for use
//Visit [You must be registered and logged in to see this link.] for this script

//specify URLs to randomly select from and pop-under
var popunder=new Array()
popunder[0]="http://freewarejava.com"
popunder[1]="http://www.dynamicdrive.com"
popunder[2]="http://www.yahoo.com"
popunder[3]="http://msnbc.com"

//specify popunder window features
//set 1 to enable a particular feature, 0 to disable
var winfeatures="width=800,height=510,scrollbars=1,resizable=1,toolbar=1,location=1,menubar=1,status=1,directories=0"

//Pop-under only once per browser session? (0=no, 1=yes)
//Specifying 0 will cause popunder to load every time page is loaded
var once_per_session=0

///No editing beyond here required/////

function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document