//preload IMG
var img1 = new Image();
img1.src = "img/menu_btn_over.jpg";
var img2 = new Image();
img2.src = "img/submenu_btn_over.jpg";


var browser;
if (navigator.appName.indexOf("Microsoft") != -1) {
	browser = window
}
else {
	browser = document
}

function menu(target, overVar) {
	if(overVar) {
		target.style.backgroundImage='url(img/menu_btn_over.jpg)';
	}else{
		target.style.backgroundImage='url(img/menu_btn.jpg)';
	}
}

function submenu(target, overVar) {
	if(overVar) {
		target.style.backgroundImage='url(img/submenu_btn_over.jpg)';
	}else{
		target.style.backgroundImage='url(img/submenu_btn.jpg)';
	}
}

function menugo(mainlink, sublink) {
	if(!sublink) {
		browser.location = "?p="+mainlink;
	}else{
		browser.location = "?p="+mainlink+"&s="+sublink;
	}
}

function checkForm() {
  if(browser.getElementById('naamveld').value.length == 0) {
	   alert("geen naam ingevuld.");
	   return false;
  }
  return true;
}