function PadDigits(n, totalDigits){
	n = n.toString();
	var pd = '';
	if (totalDigits > n.length){
		for (i=0; i < (totalDigits-n.length); i++){
			pd += '0';
		}
	}
	return pd + n.toString();
}
function dToSet(){
	dfrom_array=document.mainform.dfrom.value.split("/");
	dfMonth = dfrom_array[1] - 1;
	dfDay = dfrom_array[0] - 1;
	dfDate=new Date();
	dfDate.setFullYear(dfrom_array[2], dfMonth, dfDay)
   
	var one_day=1000*60*60*24;
	tDiff = one_day * document.mainform.nights.value;
   
	dtTime = dfDate.getTime() + tDiff;
	dtDate = new Date();
	dtDate.setTime(dtTime);
	dtMonth= dtDate.getMonth() + 1
	dtDay= dtDate.getDate()
	rstring = PadDigits(dtDay, 2) + "/" + PadDigits(dtMonth, 2) + "/" + dtDate.getFullYear();
	document.mainform.dto.value = rstring;
}