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);
	}
	document.f1.day.options[0].selected = true;
}

function getYears() {
	// You can easily customize what years can be used
	var Years = new Array(2011,2012,2013)

	for (var i = 0; i < document.f1.year.length; i++) {
		document.f1.year.options[0] = null;
	}
	timeC = new Date();
	currYear = timeC.getFullYear();
	for (var i = 0; i < Years.length; i++) {
		document.f1.year.options[i] = new Option(Years[i]);
	}
	document.f1.year.options[0].selected=true;
}

window.onLoad = getYears;