// NN4/IE4 compatible layer control system (c) 1999 Cyril A. Vechera http://sply.piter.net

function layer_show (name) {
	if (document.layers) {
		if (document.layers[name])
			document.layers[name].visibility = "show";
	} else {
		if (document.all[name])
			document.all[name].style.visibility = "visible";
	}
}

function layer_hide (name) {
	if (document.layers) {
		if (document.layers[name])
			document.layers[name].visibility = "hide";
	} else {
		if (document.all[name])
			document.all[name].style.visibility = "hidden";
	}
}

function image_set (name, src) {
	if (!document.images)
		return;
	if (src && document.images[name])
		document.images[name].src = src.src;
}

function image_load (src) {
	if (!document.images)
		return;
	var img=new Image;
	img.src=src;
	return img;
}