var name = "interstitial";

function ReadCookie(cookieName) {
   var theCookie=""+document.cookie;
   var ind=theCookie.indexOf(cookieName);
   if (ind==-1 || cookieName=="") return ""; 
   var ind1=theCookie.indexOf(';',ind);
   if (ind1==-1) ind1=theCookie.length; 
   return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}

function WriteCookie(cookieName) {
   var now = new Date();
   var nextday = new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1, 0, 0, 0, 0);
   var expires = "; expires=" + nextday.toUTCString();
   document.cookie = cookieName+ '=yes' + expires + '; path=/; domain=.gameshark.com';
}

if (ReadCookie(name) != 'yes') {
   WriteCookie(name);
   window.location="/ads/interstitial.asp?oldurl=" + window.location;
}