var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		button24_over = newImage("gfx/button24-over.gif");
		button26_over = newImage("gfx/button26-over.gif");
		button28_over = newImage("gfx/button28-over.gif");
		button30_over = newImage("gfx/button30-over.gif");
		button32_over = newImage("gfx/button32-over.gif");
		button34_over = newImage("gfx/button34-over.gif");
		button36_over = newImage("gfx/button36-over.gif");
		button38_over = newImage("gfx/button38-over.gif");
		button40_over = newImage("gfx/button40-over.gif");
		button42_over = newImage("gfx/button42-over.gif");
		preloadFlag = true;
	}
}

function potvrd() {
        if (confirm("Opravdu smazat?")) {return true;}
        else {return false;}
}

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];
		}
	}
}