function populate(objForm, selectIndex) {
	timeA = new Date(objForm.year.options[objForm.year.selectedIndex].text, objForm.month.options[objForm.month.selectedIndex].value,1);
	timeDifference = timeA - 86400000;
	timeB = new Date(timeDifference);
	
	var daysInMonth = timeB.getDate();
	
	for (var i = 0; i < objForm.day.length; i++) {
		objForm.day.options[0] = null;
	}
	
	for (var i = 0; i < daysInMonth; i++) {
		objForm.day.options[i] = new Option(i+1);
	}
	
	objForm.day.options[0].selected = true;
}

function getYears(objForm, iYearIni, iYearEnd){	
	for (var i = 0; i < objForm.year.length; i++) {
		objForm.year.options[0] = null;
	}

	timeC = new Date();
	currYear = timeC.getFullYear();
	
	var tmp = 0;
	for (var i = iYearIni; i <= iYearEnd; i++) {
		objForm.year.options[tmp] = new Option(i);
		tmp++;
	}

	objForm.year.options[0].selected=true;
	populate(objForm, 0);
}