Reading a Cookie

function getCookie(Name) {
var search = Name + "="
if (document.cookie.length > 0) { 
   offset = document.cookie.indexOf(search) 
   if (offset != -1) { // if cookie exists 
      offset += search.length 
      end=document.cookie.indexOf(";",offset) 
       if (end == -1) 
           end = document.cookie.length
    temp=document.cookie.substring(offset,end)
    return unscape(temp) } } } 

A Working Example