GetDateDiff(flddtval) {
	// functions compares today w/passed date and returns the number of days between them
	if (flddtval == undefined || flddtval =='') {
		// nothing passed
		return null;
}
	nowdt = new Date();		// today
	flddt = new Date(flddtval);	// field date, format must be integer since 1/1/70, date string, or comma delitated numbers
	if (flddt == null) {
		// no date created, bad value passed into function
		return null;
	}
	// get difference
	dtdiff = flddt - nowdt;
	// convert to days
	daysstr = new String(dtdiff/1000/60/60/24);		// 1000 ms / 60 secs / 60 mins/ 24 hrs
	daysno = parseInt(daysstr);
	return daysno;
}