var currentMenu = "home";

function swapImage(menuId){

	var menuImage = document.getElementById(menuId);
	menuImage.src = "/image/" + menuId + "_on.gif";
}

function swapImgRestore(menuId){

	var menuImage = document.getElementById(menuId);
	if (menuId == currentMenu){
		menuImage.src = "/image/" + menuId + "_current.gif";
	} else{
		menuImage.src = "/image/" + menuId + ".gif";
	}
}

function preloadImages(){

	var imageList = preloadImages.arguments;
	var imageCache = new Array(imageList.length);
	for (i=0; i<imageList.length; i++){
		imageCache[i] = new Image();
		imageCache[i].src = imageList[i];
	}
}

function setSelectedMenu(selectedMenu){

	setStatus("home", selectedMenu);
	setStatus("menu1", selectedMenu);
	setStatus("menu2", selectedMenu);
	setStatus("menu3", selectedMenu);
	setStatus("menu4", selectedMenu);
	setStatus("menu5", selectedMenu);
	setStatus("menu6", selectedMenu);
	setStatus("menu7", selectedMenu);
	setStatus("menu8", selectedMenu);
}

function setStatus(menuId, selectedMenu){

	var menuImage = document.getElementById(menuId);
	if (menuId == selectedMenu){
		menuImage.src = "/image/" + menuId + "_current.gif";
	} else{
		menuImage.src = "/image/" + menuId + ".gif";
	}
	currentMenu = selectedMenu;
}