function clearField(thefield){
	if (thefield.defaultValue==thefield.value)
		thefield.value = ""
}

jQuery(document).ready(function() {
   
   jQuery("#cat_combo").change(function(){
   		var langId   = jQuery("#lang_id").val();
   		var langCode = jQuery("#lang_code").val();
   		var catId    = jQuery("#cat_combo").val();
	    var response = $.ajax({
			method: "GET",
			url: "/includes/ajax.php",
			data: "func=get_categories_level_2&lang_id="+langId+"&lang_code="+langCode+"&cat_id="+catId,
			success: function(response){
				if(response == 'empty'){
					jQuery("#member-search-btn").attr("disabled", true);
					document.getElementById("second_combo").innerHTML = '';
					document.getElementById("third_combo").innerHTML = '';
				} else {
					jQuery("#member-search-btn").attr("disabled", false);
					document.getElementById("second_combo").innerHTML = response;
					document.getElementById("third_combo").innerHTML = '';
				}
			}
		});
   });
});

function get_cats_level_3(){
	var langId   = jQuery("#lang_id").val();
	var langCode = jQuery("#lang_code").val();
	var catId    = jQuery("#get_categories_level_2").val();
    var response = $.ajax({
		method: "GET",
		url: "/includes/ajax.php",
		data: "func=get_categories_level_3&lang_id="+langId+"&lang_code="+langCode+"&cat_id="+catId,
		success: function(response){
			if(response == 'empty'){
				document.getElementById("third_combo").innerHTML = '';
			} else {
				jQuery("#member-search-btn").attr("disabled", false);
				document.getElementById("third_combo").innerHTML = response;
			}
		}
	});
}