var img_preload_1 = new Image()
var img_preload_2 = new Image()
var img_preload_3 = new Image()
var img_preload_4 = new Image()
var img_preload_5 = new Image()
var img_preload_6 = new Image()
img_preload_1.src = "images/menu_1_over.gif";
img_preload_2.src = "images/menu_2_over.gif";
img_preload_3.src = "images/menu_3_over.gif";
img_preload_4.src = "images/menu_4_over.gif";
img_preload_5.src = "images/menu_5_over.gif";
img_preload_6.src = "images/menu_6_over.gif";

function m_over(img)
{
	img.src=img.src.replace(img.src.substr(img.src.length-4,4),"_over.gif")
}

function m_out(img)
{
	img.src=img.src.replace(img.src.substr(img.src.length-9,9),".jpg")
}

function menu(img,onOff)
{return
	var subMenuId = img.id + "_" + "sub_menu";
	
	if(onOff)
		document.getElementById(subMenuId).style.visibility = "visible";
	else
	{
		alert(activeSubMenu)
		if(activeSubMenu != subMenuId)
			document.getElementById(subMenuId).style.visibility = "hidden";
	}
}

function sub_menu(subMenuId, onOff)
{
	document.getElementById(subMenuId).style.visibility = onOff ? "visible" : "hidden";
	return;
	if(!onOff)
	{
		subMenuElement.style.visibility = "hidden";
	}
	activeSubMenu = onOff ? subMenuElement.id : null;
}