function initSelectYear() {
	setSelectYear("birth_year", -19, 0, 1);
	setSelectYear("measure_year", -19, 0, 20);
}
function setSelectYear(parentId, startOffset, endOffset, selectedNumber) {
	var today = new Date();
	var year = today.getYear();
	if(year < 2000) { year += 1900 }
	var obj = document.getElementById(parentId);
	var max = endOffset - startOffset + 1;
	var option = new Array(max);
	setText = "";
	for(i = 0; i < max; i++) {
		option[i] = document.createElement('option');
		setText = year + startOffset + i;
		option[i].appendChild(document.createTextNode(setText));
		option[i].value = setText;
		if(i == (selectedNumber - 1)) {
			option[i].selected = true;
		}
		obj.appendChild(option[i]);
	}
}