function setCookie(eventName,cookieValue,expire) { 
   if (expire == -1) {
    document.cookie = eventName + "=" + escape(cookieValue) + "; path=/;";
   } else {
    document.cookie = eventName + "=" + escape(cookieValue) + "; path=/; expires=" + expire.toGMTString() + ";";
   }
} 

function getCookie(eventName) {
    var flag = document.cookie.indexOf(eventName + '='); 

    if (flag != -1) 
    {  
        flag    += eventName.length + 1;
        end =  document.cookie.indexOf(';', flag);

        if (end == -1) 
            end = document.cookie.length;
        return unescape(document.cookie.substring(flag, end));
    } 
}