$(document).ready(function() {
	$('input.volSelect').click(function() {
		var parentId = $(this.parentNode).attr('for');
		var checked = this.checked;
		$('#' + parentId + ' > option').each(function() {
			if($(this).val() != ''){
				if(checked){
					$(this).attr("selected","selected");
				}
				else{
					$(this).removeAttr("selected");
				}
			}
		});
	});
});