function showCatMenu() {
	if (document.getElementById) {
		document.getElementById("catmenu").style.visibility="visible";
		document.getElementById("cattrigger").style.visibility="visible";
	}
}
function hideCatMenuNow() {
	if (document.getElementById) {
		document.getElementById("catmenu").style.visibility="hidden";
		document.getElementById("cattrigger").style.visibility="hidden";
	}
}
function hideCatMenu() {
	hideCatMenuNow();
}

function showCatSub(submenu,wrapper,item) { // action for menu items
	if(document.getElementById){
    timerRunning = false;
		var wrapperWidth = getCatWidth(wrapper);
		var wrapperPosX = offCatX(wrapper);
		var wrapperPosY = offCatY(wrapper);
		var itemPosY = offCatY(item);
		var halfwrapperWidth = wrapperWidth/2.5;
		var submenuX = wrapperPosX + halfwrapperWidth;
		var submenuY = wrapperPosY + itemPosY + 6;
		document.getElementById(submenu).style.top=submenuY + 'px';
		document.getElementById(submenu).style.left=submenuX + 'px';
		document.getElementById(submenu).style.visibility='visible';
	}
}

function clearCatAll() { // clear everything
	if(document.getElementById){
		clearCatSubs();
		hideCatMenu();		
 	}
}

function clearCatSubsNow() {
	if(document.getElementById) {
   	document.getElementById('1SubMenu').style.visibility='hidden';
  	document.getElementById('2SubMenu').style.visibility='hidden';
  	document.getElementById('3SubMenu').style.visibility='hidden';
  	document.getElementById('4SubMenu').style.visibility='hidden';
  	document.getElementById('5SubMenu').style.visibility='hidden';
	}
}
	

function clearCatSubs() { // clear sub menus when a menu is open
	clearCatSubsNow();
}

function getCatWidth(elm) { // get the width of an element
	var x = document.getElementById(elm);
	return x.offsetWidth;
}

function offCatX(elm) { // get the x offset of an element from it's parent
	var x = document.getElementById(elm);
	return x.offsetLeft;
}

function offCatY(elm) { // get the y offset of an element from it's parent
	var x = document.getElementById(elm);
	return x.offsetTop;
}