function getCookieVal (offset) {
         var endstr = document.cookie.indexOf (";", offset); 
            if (endstr == -1) 
            endstr = document.cookie.length; 
         return unescape(document.cookie.substring(offset, endstr)); 
         }

function GetCookie (name) {
         var arg = name + "=";
         var alen = arg.length; 
         var clen = document.cookie.length; 
         var i = 0; 
         while (i < clen) {
         var j = i + alen; 
             if (document.cookie.substring(i, j) == arg) 
             return getCookieVal (j); 
         i = document.cookie.indexOf(" ", i) + 1; 
             if (i == 0) break; 
             }
       return ""; 
     }

function SetCookie(name,value){
var expDays = 365; // number of days the cookie should last
var expDate = new Date();
expDate.setTime(expDate.getTime() +  (24 * 60 * 60 * 1000 * expDays)); 
document.cookie = name + "=" + escape(value) + "; expires=Tue, 31 Dec 2999 23:59:59 GMT;";
}