function newImage(arg) {
		if (document.images) {
			rslt = new Image();
			rslt.src = arg;
			return rslt;
		}
	}
	
	function changeImages() {
		if (document.images && (preloadFlag == true)) {
			for (var i=0; i<changeImages.arguments.length; i+=2) {
				// document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
				document.getElementById(changeImages.arguments[i]).src = changeImages.arguments[i+1];
				
			}
		}
	}
	
	var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			
			var scrollUp = newImage("images/icons/scrollUpOver.png");
			var scrollDown = newImage("images/icons/scrollDownOver.png");
			
			var nav_intro_nl = newImage("images/texts/lang_nl/navOver_intro.gif");
			var nav_housing_nl = newImage("images/texts/lang_nl/navOver_housing.gif");
			var nav_andre_nl = newImage("images/texts/lang_nl/navOver_andre.gif");
			var nav_pr_nl = newImage("images/texts/lang_nl/navOver_pr.gif");
			var nav_security_nl = newImage("images/texts/lang_nl/navOver_security.gif");
			var nav_sell_nl = newImage("images/texts/lang_nl/navOver_sell.gif");
			
			var nav_intro_en = newImage("images/texts/lang_en/navOver_intro.gif");
			var nav_housing_en = newImage("images/texts/lang_en/navOver_housing.gif");
			var nav_andre_en = newImage("images/texts/lang_en/navOver_andre.gif");
			var nav_pr_en = newImage("images/texts/lang_en/navOver_pr.gif");
			var nav_security_en = newImage("images/texts/lang_en/navOver_security.gif");
			var nav_sell_en = newImage("images/texts/lang_en/navOver_sell.gif");
			
			preloadFlag = true;
		}
	}