now = new Date();

// code to work out if the user is experiencing daylight savings
// should work for both northern and southern hemispheres
// would be much easier with built in DST function!!

// current year for use in date creation
y = now.getYear();

// get the timezone at new years eve and 1st june
midYear = new Date(y,6,1); // June 1st
midYearOffset = midYear.getTimezoneOffset();

endYear = new Date(y,12,31); // Dec 31st
endYearOffset = endYear.getTimezoneOffset();

dst = 0;
// if both are the same, no DST at user time zone
if(midYearOffset != endYearOffset)
{
	// find out which time offset is larger
	dstOffset = endYearOffset;
	if(midYearOffset < endYearOffset) dstOffset = midYearOffset;

	// now if the current offset is equal to DST, then it's daylight savings!
	if(dstOffset == now.getTimezoneOffset()) dst = 1;
}

document.forms.InputForm.clienttimedst.value = dst; // update DST hidden field
document.forms.InputForm.clienttimeoffset.value = now.getTimezoneOffset(); // hours from GMT