<script>
function getClientTimezone(){
var oDate = new Date();
var nTimezone = -oDate.getTimezoneOffset() / 60;
return nTimezone.toFixed(2);
}
alert(getClientTimezone());
</script>
<script type="text/javascript">
var d = new Date();
document.write(-d.getTimezoneOffset()/60);
</script>
