// preload pictures
function newImage(path) {
	var image = new Image();
	image.src = path;
	return image;
}
var imagesArr = ['img/menu1a.gif','img/menu2a.gif','img/menu3a.gif','img/menu4a.gif','img/icon1a.gif','img/icon2a.gif','img/icon3a.gif'];
for (var i = 0; i < imagesArr.length; i++) {
	newImage(imagesArr[i]);
}
// menu/icons :hover
function show_hide(name, act, menu_name) {
	menu = menu_name || 'menu';
	document.getElementById(menu + name).src = 'img/' + menu + name + act + '.gif';
}