Javascript to work on select boxes

Javascript to work on select boxes2006-04-04

function add_select_option(select_id,text,value) {
	var select_eid = document.getElementById(select_id);
	if (!select_eid || !text || !value) { return false; }

	var option = document.createElement('option');
	option.setAttribute('value',key);
	var text = document.createTextNode(value);
	option.appendChild(text);

	select_eid.appendChild(option);

	return true;
}

function remove_select_option(select_id,index) {
	var select_eid = document.getElementById(select_id);
	if (!select_eid || typeof(index) != 'number') { return false; }

	if (!select_eid.options[index]) { return false; }
	var remove_eid = select_eid.options[index];

	select_eid.removeChild(remove_eid);

	return true;
}

function clear_select_options(select_id) {
	var select_eid = document.getElementById(select_id);
	if (!select_eid) { return false; }

	var kids = select_eid.options.length;
	
	for (var i = 0;i <= kids;i++) {
		// Remove the zeroth element as many times as there are items
		remove_select_option(select_id,0);
	}

	return true;
}