var preLoadTimer = -1;
var preLoadTimerH = -1;
var ImageObj = 0;

function preLoadImages() {
	if (document.images) {
		ImageObj++;
		if (page_id == "i000000") {
	    n1 = new Image;
	    n1.src = view_folder + '/images/menu_home/bezoek.jpg';
	    n2 = new Image;
	    n2.src = view_folder + '/images/menu_home/tentoonstelling.jpg';
      n3 = new Image;
	    n3.src = view_folder + '/images/menu_home/educatie.jpg';
	    n4 = new Image;
	    n4.src = view_folder + '/images/menu_home/onderzoek.jpg';
	    n5 = new Image;
	    n5.src = view_folder + '/images/menu_home/natuur.jpg';
	    n6 = new Image;
	    n6.src = view_folder + '/images/menu_home/naturalis.jpg';
	    n7 = new Image;
	    n7.src = view_folder + '/images/menu_home/pers.jpg';
    }
    else {
      n10 = new Image;
		  n10.src = view_folder + '/images/menu_vervolg/bezoek.jpg';
		  n20 = new Image;
		  n20.src = view_folder + '/images/menu_vervolg/tentoonstelling.jpg';
      n30 = new Image;
		  n30.src = view_folder + '/images/menu_vervolg/educatie.jpg';
		  n40 = new Image;
		  n40.src = view_folder + '/images/menu_vervolg/onderzoek.jpg';
		  n50 = new Image;
		  n50.src = view_folder + '/images/menu_vervolg/natuur.jpg';
		  n60 = new Image;
		  n60.src = view_folder + '/images/menu_vervolg/naturalis.jpg';
		  n70 = new Image;
		  n70.src = view_folder + '/images/menu_vervolg/pers.jpg';
    }
	}
}

function preLoadImagesH() {
	if (document.images) {
		ImageObj++;
		if (page_id == "i000000") {
	    n1h = new Image;
	    n1h.src = view_folder + '/images/menu_home/bezoek_a.jpg';
	    n2h = new Image;
	    n2h.src = view_folder + '/images/menu_home/tentoonstelling_a.jpg';
      n3h = new Image;
	    n3h.src = view_folder + '/images/menu_home/educatie_a.jpg';
	    n4h = new Image;
	    n4h.src = view_folder + '/images/menu_home/onderzoek_a.jpg';
	    n5h = new Image;
	    n5h.src = view_folder + '/images/menu_home/natuur_a.jpg';
	    n6h = new Image;
	    n6h.src = view_folder + '/images/menu_home/naturalis_a.jpg';
	    n7h = new Image;
	    n7h.src = view_folder + '/images/menu_home/pers_a.jpg';
    }
    else {
  	  n10h = new Image;
		  n10h.src = view_folder + '/images/menu_vervolg/bezoek_a.jpg';
		  n20h = new Image;
		  n20h.src = view_folder + '/images/menu_vervolg/tentoonstelling_a.jpg';
		  n30h = new Image;
		  n30h.src = view_folder + '/images/menu_vervolg/educatie_a.jpg';
		  n40h = new Image;
		  n40h.src = view_folder + '/images/menu_vervolg/onderzoek_a.jpg';
		  n50h = new Image;
		  n50h.src = view_folder + '/images/menu_vervolg/natuur_a.jpg';
		  n60h = new Image;
		  n60h.src = view_folder + '/images/menu_vervolg/naturalis_a.jpg';
		  n70h = new Image;
		  n70h.src = view_folder + '/images/menu_vervolg/pers_a.jpg';
    }
	}
}

function changeImage(imgDocID, imgObjName) {
	if (ImageObj == 2) {
		document.images[imgDocID].src = eval(imgObjName + '.src')
	}
}

preLoadTimer = window.setTimeout(preLoadImages, 0);
preLoadTimerH = window.setTimeout(preLoadImagesH, 500);