// prototype $() function to replace document.getElementById()
function $() {
	var elements = new Array();

	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
		element = document.getElementById(element);

		if (arguments.length == 1)
		return element;

		elements.push(element);
	}

	return elements;
}

function trim(str) {
	return str.replace(/^\s+|\s+$/g, "");
}

function init_left_menu() {
	el = $("menu_level1_selected");
	if (el != undefined) {
		bgImage = "";
		if (el.offsetHeight > 26) bgImage = '_big';
		el.style.backgroundImage = 'url(/library/57/images/menu_level1_bg' + bgImage + '.gif)';
	}
	el = $("menu_level1_link_selected");
	if (el != undefined) {
		el.style.color = '#389C48';
	}
}

function mover_menu_level1(el,ela) {
	if (el.id == "menu_level1_selected") return;
	bgImage = "";
	if (el.offsetHeight > 26) bgImage = '_big';
	el.style.backgroundImage = 'url(/library/57/images/menu_level1_bg' + bgImage + '.gif)';
	el = $(ela);
	el.style.color = '#389C48';
}

function mout_menu_level1(el,ela) {
	if (el.id == "menu_level1_selected") return;
	el.style.backgroundImage = 'none';
	el = $(ela);
	el.style.color = '#555555';
}

function do_search(frm) {
	with (frm) {
		if (trim(trefwoord.value) == "") {
			alert("Gelieve een zoekterm in te vullen.");
			trefwoord.focus();
			return;
		} else {
			submit();
		}
	}
}
addevent(window, "load", init_left_menu);