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) {
		bt1_over = newImage("picture_library/bt1-over.gif");
		bt2_over = newImage("picture_library/bt2-over.gif");
		bt3_over = newImage("picture_library/bt3-over.gif");
		bt4_over = newImage("picture_library/bt4-over.gif");
		bt5_over = newImage("picture_library/bt5-over.gif");
		bt6_over = newImage("picture_library/bt6-over.gif");
		bt7_over = newImage("picture_library/bt7-over.gif");

		kl_liczarki_over = newImage("picture_library/kl_liczarki-over.gif");
		kl_multisejfy_over = newImage("picture_library/kl_multisejfy-over.gif");
		kl_dyspensery_over = newImage("picture_library/kl_dyspensery-over.gif");
		kl_wrzutnie_over = newImage("picture_library/kl_wrzutnie-over.gif");
		kl_wplatomaty_over = newImage("picture_library/kl_wplatomaty-over.gif");

		kl_biolock_over = newImage("picture_library/kl_biolock-over.gif");
		kl_biometal_over = newImage("picture_library/kl_biometal-over.gif");
		kl_bioswitch_over = newImage("picture_library/kl_bioswitch-over.gif");
		kl_bioimmobilizer_over = newImage("picture_library/kl_bioimmobilizer-over.gif");
		kl_biocontroller_over = newImage("picture_library/kl_biocontroller-over.gif");

		kl_a10_over = newImage("picture_library/kl_a10-over.gif");
		kl_u560_over = newImage("picture_library/kl_u560-over.gif");
		kl_iClock260_over = newImage("picture_library/kl_iClock260-over.gif");

		preloadFlag = true;
                changeImages();
	}
}