function checkCookie(name)
{
   var params = document.cookie.split(";");
   var value = "";
   var enable = "";
   for (var i = 0;i < params.length;i++)
   {
       value = params[i].split("=");
       if (value[0].indexOf(name) >= 0)
       {
           enable = value[1];
       }
   }
   if (enable == "off")
       return false;
   else if (enable == "on")
       return true;
   else if (enable == "")
   	return 0;
   else
   	return enable;
}

function setCookie(name,state)
{
   var date = new Date();
   date.setTime(date.getTime()+(30*24*60*60*1000)); //this is 30 days for auto-expire
   document.cookie = name+"="+state+"; expires="+date.toGMTString()+"; path=/";
}

function expireCookie(name)
{
   var date = new Date();
   date.setTime(date.getTime()-3600);
	document.cookie = name+"=off; expires="+date.toGMTString()+"; path=/";
}