// close all submenus initially
if(document.getElementById){
	document.write('<style type="text/css">\n')
	document.write('.options{display: none;}\n')
	document.write('</style>\n')
}

// open submenu when page loads using the current page id passed from header
function menu(curId){
	var curMain = curId.substring(1,2);								//holds the submenu index number - one digit ie. 2
	var subName = "sub" + curMain;										//ie. sub2
	var openSub = "";

	// only open submenu if it exists
	if (document.getElementById(subName)){
		openSub = document.getElementById(subName);			//holds sub2 element
		openSub.style.display = "block";								//change display from none to block
	}
	
// selected menu item indicator
	var curName = "document." + curId;
	var curObj = eval(curName);
	var imgName = curId.substring(1);									//get the image index number
	curObj.src = "/images/nav/on" + imgName + ".gif";	//set the current image source to "on"
}