function SetCookie(cookieName,cookieValue,nDays) {
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString() + ";path=/";
}

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));
}