function menu1_onmouseover(){
document.getElementById("home").setAttribute("src","images/home_btn_active.png");}
function menu1_onmouseout(){
document.getElementById("home").setAttribute("src","images/home_btn.png");}
function menu2_onmouseover(){
document.getElementById("bedrijf").setAttribute("src","images/bedrijf_btn_active.png");}
function menu2_onmouseout(){
document.getElementById("bedrijf").setAttribute("src","images/bedrijf_btn.png");}
function menu3_onmouseover(){
document.getElementById("nieuws").setAttribute("src","images/nieuws_btn_active.png");}
function menu3_onmouseout(){
document.getElementById("nieuws").setAttribute("src","images/nieuws_btn.png");}
function menu4_onmouseover(){
document.getElementById("gallerij").setAttribute("src","images/gallerij_btn_active.png");}
function menu4_onmouseout(){
document.getElementById("gallerij").setAttribute("src","images/gallerij_btn.png");}
function menu5_onmouseover(){
document.getElementById("contact").setAttribute("src","images/contact_btn_active.png");}
function menu5_onmouseout(){
document.getElementById("contact").setAttribute("src","images/contact_btn.png");}



function menu1a_onmouseover(){
document.getElementById("home").setAttribute("src","images/home_btn_active1.png");}
function menu1a_onmouseout(){
document.getElementById("home").setAttribute("src","images/home_btn1.png");}
function menu2a_onmouseover(){
document.getElementById("bedrijf").setAttribute("src","images/bedrijf_btn_active1.png");}
function menu2a_onmouseout(){
document.getElementById("bedrijf").setAttribute("src","images/bedrijf_btn1.png");}
function menu3a_onmouseover(){
document.getElementById("nieuws").setAttribute("src","images/nieuws_btn_active1.png");}
function menu3a_onmouseout(){
document.getElementById("nieuws").setAttribute("src","images/nieuws_btn1.png");}
function menu4a_onmouseover(){
document.getElementById("gallerij").setAttribute("src","images/gallerij_btn_active1.png");}
function menu4a_onmouseout(){
document.getElementById("gallerij").setAttribute("src","images/gallerij_btn1.png");}
function menu5a_onmouseover(){
document.getElementById("contact").setAttribute("src","images/contact_btn_active1.png");}
function menu5a_onmouseout(){
document.getElementById("contact").setAttribute("src","images/contact_btn1.png");}




function fbmenu_onmouseover(){
document.getElementById("sm").setAttribute("src","images/logo_facebook_color.png");}
function fbmenu_onmouseout(){
document.getElementById("sm").setAttribute("src","images/logo_facebook_grey.png");}
function menuatp_onmouseover(){
document.getElementById("atp").setAttribute("src","images/logoatpkleur.png");}
function menuatp_onmouseout(){
document.getElementById("atp").setAttribute("src","images/logoatp.png");}
function menuech_onmouseover(){
document.getElementById("ech").setAttribute("src","images/logoechkleur.png");}
function menuech_onmouseout(){
document.getElementById("ech").setAttribute("src","images/logoech.png");}
function menutr_onmouseover(){
document.getElementById("transport").setAttribute("src","images/logotransportkleur.png");}
function menutr_onmouseout(){
document.getElementById("transport").setAttribute("src","images/logotransport.png");}
function menueuro_onmouseover(){
document.getElementById("euro").setAttribute("src","images/logoeurokleur.png");}
function menueuro_onmouseout(){
document.getElementById("euro").setAttribute("src","images/logoeuro.png");}
function menue2_onmouseover(){
document.getElementById("contacteuro").setAttribute("src","images/contact_euro_active.png");}
function menue2_onmouseout(){
document.getElementById("contacteuro").setAttribute("src","images/contact_euro.png");}
function menue1_onmouseover(){
document.getElementById("home_euro").setAttribute("src","images/home_euro_active.png");}
function menue1_onmouseout(){
document.getElementById("home_euro").setAttribute("src","images/home_euro.png");}
function menue1a_onmouseover(){
document.getElementById("home_euro").setAttribute("src","images/home_euro_active1.png");}
function menue1a_onmouseout(){
document.getElementById("home_euro").setAttribute("src","images/home_euro1.png");}
function menue2a_onmouseover(){
document.getElementById("contacteuro").setAttribute("src","images/contact_euro_active1.png");}
function menue2a_onmouseout(){
document.getElementById("contacteuro").setAttribute("src","images/contact_euro1.png");}

//function for opening links in external pages
function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;

//function for hiding content
function setDisplay(objectID,state) {
	var object = document.getElementById(objectID);
	object.style.display = state;
}

function toggleDisplay(objectID) {
	var object = document.getElementById(objectID);
	state = object.style.display;
	if (state == 'none')
		object.style.display = 'block';
	else if (state != 'none')
		object.style.display = 'none'; 
}