var ua = navigator.userAgent.toLowerCase();

function findLayer(item) {
	if( window.mmIsOpera ) return(document.getElementById(item));
	if (document.getElementById) return(document.getElementById(item));
	if (document.all) return(document.all[item]);
	return(false);
}

var menuCount = 6;
var activeMenu = "";
var activeSubMenu = "";
var hidedMenu = "";

function menuOn(menuId) {
	setVisibility(menuId,'visible');
	activeMenu = menuId;
	closeAllLayers();
	changeMenuPic(menuId + '_img',menuId + '_on.gif');
}

function menuOut(menuId) {
	activeMenu = "";
	hidedMenu = menuId;
	setTimeout( 'hideMenu();' , 10 );
}

function setVisibility(menuId,vis) {
	if( activeMenu != menuId ) {
		if (findLayer(menuId)) {
			var actLayer = findLayer(menuId);
			actLayer.style.visibility = vis;
			changeMenuPic(hidedMenu + '_img',hidedMenu + '_off.gif');
		}
	}
}
function hideMenu(){
	setVisibility(hidedMenu,"hidden");
}

function closeAllLayers() {
	for (var i=0; i<=menuCount; i++) {
		setVisibility("Menu_" + i,"hidden");
	}
}

function changeMenuPic(menuId,picName) {
	if ( findLayer(menuId) ) {
	var actImg = findLayer(menuId);
	
	for (var i=0; i<=6; i++)
		{
			var myMenu = "Menu_" + i + "_img";
			if (idMainMenu == i && menuId == myMenu) {
				var newSrc = '/group/images/mainmenu/Menu_'+ i +'_on.gif';
				actImg.src = newSrc;
				break;
			}
			else {
				var newSrc = '/group/images/mainmenu/' + picName;
				actImg.src = newSrc;
			}
		}
	}
}

function changeIt(ImageToChange, ImageToShow)
{
	if (document.images)
	{
		document.images[ImageToChange].src = ImageToShow.src;
	}
}

if (document.images)
{
	group1 = new Image;
	group1.src = "/group/images/mainmenu/Menu_6_off.gif";
	group1_high = new Image;
	group1_high.src = "/group/images/mainmenu/Menu_6_on.gif";
	
}