Set Time zone

I want to set a timer so that at certain hours it will post a message. That I can do but I want it to do it in my time zone not the users how would you do that?:confused:

Here's an edited function, mostly from http://tech.irt.org/articles/js076/index.htm


<SCRIPT LANGUAGE="JavaScript">
function getservertime(){
var youroffset = 5; //set this to YOUR gmt offset
var thetime=new Date();
timezoneoffset=thetime.getTimezoneOffset();
timezoneoffset=timezoneoffset * (-1);
thetime.setTime(thetime.getTime()+timezoneoffset*60*1000);
thetime.setTime(thetime.getTime()+youroffset*60*60*1000);
alert(thetime);
}
</script>
</HEAD>