// get the timezone offset
userdt = new Date();
userTZ = Math.round(parseFloat(userdt.getTimezoneOffset() / 60))
// set cookie to expire in 1 day
var expDate = new Date();
expDate.setTime(expDate.getTime()+(24*60*60*1000));
var expires = "; expires="+expDate.toGMTString();
// set a cookie for user timezone
document.cookie = 'martelnetUserTZ='+userTZ+expires+'; path=/';