var plusImg = new Image();
	plusImg.src = "/images/arrow_right.gif"
var minusImg = new Image();
	minusImg.src = "/images/arrow_down.gif"
	

function hideLevel( _levelId, _imgId ) {
	var thisLevel = document.getElementById( _levelId );
	var thisImg = document.getElementById( _imgId );
	thisLevel.className = "navmenu1closed";
	thisImg.src = plusImg.src;
	}
	
	
function showLevel( _levelId, _imgId ) {
	var thisLevel = document.getElementById( _levelId );
	var thisImg = document.getElementById( _imgId );
	if ( thisLevel.className == "navmenu1closed") {
		thisLevel.className = "navmenu1";
		thisImg.src = minusImg.src;
		}
	else {
		hideLevel( _levelId, _imgId);
		}
	}