// Menu - onMouseOver
function mouseOver(menuId){
	var oldImg = document.getElementById(menuId).firstChild.getAttribute("src");
	var newImg = oldImg.replace(/_0/, "_1");
	document.getElementById(menuId).firstChild.src = newImg;
}
// Menu - onMouseOut
function mouseOut(menuId){
	var oldImg = document.getElementById(menuId).firstChild.getAttribute("src");
	var newImg = oldImg.replace(/_1/, "_0");
	document.getElementById(menuId).firstChild.src = newImg;
}