/*
 * onload
 */
$(function(){

	$("select#category_id").change(function() {
		if ($(this).val() > 0 || $(this).val() == "0" ) {
			url = "./index.php?category_id=" + $(this).val();
		} else {
			url = "./index.php";
		}
		window.location.replace(url);
	});	

});