// JavaScript Document
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) {
		back_over = newImage("images/back-over.gif");
		top_over = newImage("images/top-over.gif");
		obsah_over = newImage("images/mainmenu/obsah-over.gif");
		zemshoe_over = newImage("images/mainmenu/zemshoe-over.gif");
		zemprof_over = newImage("images/mainmenu/zemprof-over.gif");
		zemkolekce_over = newImage("images/mainmenu/zemkolekce-over.gif");
		promine_over = newImage("images/mainmenu/promine-over.gif");
		uvod_over = newImage("images/mainmenu/uvod-over.gif");
		hist_over = newImage("images/mainmenu/hist-over.gif");
		popis_over = newImage("images/mainmenu/popis-over.gif");
		spec_over = newImage("images/mainmenu/spec-over.gif");
		certif_over = newImage("images/mainmenu/certif-over.gif");
		testy_over = newImage("images/mainmenu/testy-over.gif");		
		public_over = newImage("images/mainmenu/public-over.gif");
		kontakt_over = newImage("images/mainmenu/kontakt-over.gif");
		odkaz_over = newImage("images/mainmenu/odkaz-over.gif");
		odkaz_kontakt_over = newImage("images/mainmenu/odkaz-kontakt_over.gif");
		random_zemshoe_over = newImage("images/mainmenu/random-zemshoe_over.gif");
		random_zemprof_over = newImage("images/mainmenu/random-zemprof_over.gif");
		random_odkaz_over = newImage("images/mainmenu/random-odkaz_over.gif");
		random_kontakt_over = newImage("images/mainmenu/random-kontakt_over.gif");
		random_promine_over = newImage("images/mainmenu/random-promine_over.gif");
		home_over = newImage("images/mainmenu/home-over.gif");
		napov_over = newImage("images/mainmenu/napov-over.gif");
		preloadFlag = true;
	}
}