Set UTC problem?

1

I added in my application universal time, and I gave start and stop time. The process is going smoothly, but if I change my system (local) time, the entire time will be changed. Is there any solution to solve this problem?

Example code:-

     var  UTC_timefixing:

var local time:Date=new Date();

UTC_timefixing = new Date();
UTC_timefixing.setUTCHours(
UTC_timefixing.getUTCHours()
UTC_timefixing.getUTCMinutes()
UTC_timefixing.getUTCSeconds()
);

var time_diff:Number;

time_diff=timefixing .gettime() - local time.time();