/*//Preload menu images ivm sneller laden bij pagina's die traag laden (zoals image galleries) <-- geen snelheidswinst
if (document.images)
{
	preload_image_object = new Image();
	// set image url
	image_url = new Array();
	image_url[0] = "http://www.methon.nl/img/menu/accessoires.png";
	image_url[1] = "http://www.methon.nl/img/menu/crash.png";
	image_url[2] = "http://www.methon.nl/img/menu/download.png";
	image_url[3] = "http://www.methon.nl/img/menu/klaphekken.png";
	image_url[4] = "http://www.methon.nl/img/menu/menu_slagbomen.png";
	image_url[5] = "http://www.methon.nl/img/menu/openbaarvervoer.png";
	image_url[6] = "http://www.methon.nl/img/menu/pillars.png";
	image_url[7] = "http://www.methon.nl/img/menu/png.png";
	image_url[8] = "http://www.methon.nl/img/menu/risingstep.png";
	image_url[9] = "http://www.methon.nl/img/menu/slagbomen.png";
	image_url[10] = "http://www.methon.nl/img/menu/smartlane.png";
	image_url[11] = "http://www.methon.nl/img/menu/speedgates.png";
	image_url[12] = "http://www.methon.nl/img/menu/tensabarriers.png";
	image_url[13] = "http://www.methon.nl/img/menu/toegangstechnieken.png ";
	image_url[14] = "http://www.methon.nl/img/menu/tourniquetshoog.png";
	image_url[15] = "http://www.methon.nl/img/menu/tourniquetslaag.png";
	image_url[16] = "http://www.methon.nl/img/menu_item.jpg";
	image_url[17] = "http://www.methon.nl/img/menu/menu_itemA.jpg";
	image_url[16] = "http://www.methon.nl/img/menu_itembig.jpg";
	image_url[17] = "http://www.methon.nl/img/menu/menu_itemAbig.jpg";

	var i = 0;
	for(i=0; i<=3; i++) 
		preload_image_object.src = image_url[i];
}*/

menu_status = new Array();

function showHide(theid,theMenu){
    if (document.getElementById) {
    var switch_id = document.getElementById(theid);

        if(menu_status[theid] != 'show') {
           switch_id.className = 'show';
           menu_status[theid] = 'show';
	   theMenu.style.backgroundImage = "url(img/menu_itemA.jpg)";
        }else{
           switch_id.className = 'hide';
           menu_status[theid] = 'hide';
	   theMenu.style.backgroundImage = "url(img/menu_item.jpg)";
        }
    }
}

// editMenu vervangt de tekst in het menu door een plaatje
// zonder javascript zie je gewoon tekst
// voor de zekerheid wordt de tekst er wel onzichtbaar bijgezet voor zoekmachines etc.

function editMenu() {
	var myElements = getElementsByClass("menu1");
	for ( i=0;i<myElements.length;i++ ) {
		var menu_image = myElements[i].getAttribute('menu_image');
		var oldText = myElements[i].innerHTML;
		var newText = "<span style=\"display: none;\">"+oldText+"</span>";
		myElements[i].innerHTML="<img style=\"border: none 0px;\" class=\"menu_textimg\" src=\"/img/menu/"+ menu_image +"\" alt=\""+ oldText +"\"  />"+newText;
	}
	
	var myElements = getElementsByClass("menu2");
	for ( i=0;i<myElements.length;i++ ) {
		var menu_image = myElements[i].getAttribute('menu_image');
		var oldText = myElements[i].innerHTML;
		var newText = "<span style=\"display: none;\">"+oldText+"</span>";
		myElements[i].innerHTML="<img style=\"border: none 0px;\" class=\"menu_textimg2\" src=\"/img/menu/"+ menu_image +"\" alt=\""+ oldText +"\"  />"+newText;
	}


}

function getElementsByClass(classname){
	var rv = []; 
	var elems  = document.getElementsByTagName('a')
	if (elems.length){
		for (var x in elems ){
			if (elems[x] && elems[x].className && elems[x].className == classname){
				rv.push(elems[x]);
			}
		}
	}
	return rv; 
}