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];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		menu_project_over = newImage("../grafika/menu_project_en-over.jpg");
		menu_architect_over = newImage("../grafika/menu_architect_en-over.jpg");
		menu_location_over  = newImage("../grafika/menu_location_en-over.jpg");
		menu_specifications_over = newImage("../grafika/menu_specifications_en-over.jpg");
		menu_floorplans_over = newImage("../grafika/menu_floorplans_en-over.jpg");
		menu_spaceplanning_over = newImage("../grafika/menu_spaceplanning_en-over.jpg");
		menu_developer_over = newImage("../grafika/menu_developer_en-over.jpg");		
		preloadFlag = true;
	}
}