function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (i=0;i<array.length;i+=2) {
			img = null; var n = array[i];
			if (d.images) {
				if (d.layers) {img = findElement(n,0);}
				else {img = d.images[n];}
			}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (!img && d.getElementsByName) {
				var elms = d.getElementsByName(n);
				if (elms) {
					for (j=0;j<elms.length;j++) {
						if (elms[j].src) {img = elms[j]; break;}
					}
				}
			}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_vorige_on     = newImage('../images/nav_extranet/tabbalk-over_vorige.gif');
		pre_vorige_off    = newImage('../images/nav_extranet/tabbalk_vorige.gif');

		pre_image14_on    = newImage('../images/nav_extranet/tabbalk-over_14.gif');
		pre_image14_off   = newImage('../images/nav_extranet/tabbalk_14.gif');
		pre_image14_ac    = newImage('../images/nav_extranet/tabbalk-actief_14.gif');

		pre_image05_on    = newImage('../images/nav_extranet/tabbalk-over_05.gif');
		pre_image05_off   = newImage('../images/nav_extranet/tabbalk_05.gif');
		pre_image05_ac    = newImage('../images/nav_extranet/tabbalk-actief_05.gif');

		pre_image06_on    = newImage('../images/nav_extranet/tabbalk-over_06.gif');
		pre_image06_off   = newImage('../images/nav_extranet/tabbalk_06.gif');
		pre_image06_ac    = newImage('../images/nav_extranet/tabbalk-actief_06.gif');

		pre_image07_on    = newImage('../images/nav_extranet/tabbalk-over_07.gif');
		pre_image07_off   = newImage('../images/nav_extranet/tabbalk_07.gif');
		pre_image07_ac    = newImage('../images/nav_extranet/tabbalk-actief_07.gif');

		pre_image09_on    = newImage('../images/nav_extranet/tabbalk-over_09.gif');
		pre_image09_off   = newImage('../images/nav_extranet/tabbalk_09.gif');
		pre_image09_ac    = newImage('../images/nav_extranet/tabbalk-actief_09.gif');

		pre_image11_on    = newImage('../images/nav_extranet/tabbalk-over_11.gif');
		pre_image11_off   = newImage('../images/nav_extranet/tabbalk_11.gif');
		pre_image11_ac    = newImage('../images/nav_extranet/tabbalk-actief_11.gif');

		pre_image17_on    = newImage('../images/nav_extranet/tabbalk-over_17.gif');
		pre_image17_off   = newImage('../images/nav_extranet/tabbalk_17.gif');
		pre_image17_ac    = newImage('../images/nav_extranet/tabbalk-actief_17.gif');

		pre_image18_on    = newImage('../images/nav_extranet/tabbalk-over_18.gif');
		pre_image18_off   = newImage('../images/nav_extranet/tabbalk_18.gif');
		pre_image18_ac    = newImage('../images/nav_extranet/tabbalk-actief_18.gif');

		pre_uitloggen_on  = newImage('../images/nav_extranet/tabbalk-over_uitloggen.gif');
		pre_uitloggen_off = newImage('../images/nav_extranet/tabbalk_uitloggen.gif');
		preloadFlag = true;
	}
}

preloadImages();