function swapImg(i,s){
	if (typeof(i) == "object")
		i.src = s;
		else
		document.getElementById(i).src = s;
}

var lastMenu = null;
var menuTimer = null;
function showMenu(i){
	clearTimeout(menuTimer);
	if(lastMenu)
		menuTimer = setTimeout("document.getElementById('"+lastMenu+"').style.display = 'none'",10);
	if(i){
		clearTimeout(menuTimer);
		if(lastMenu)
			document.getElementById(lastMenu).style.display = 'none';
		document.getElementById(i).style.display = "block";
		lastMenu = i;
		}
}