function mouseOut( targetId ) {
  	target = document.getElementById( targetId );
    target.style.visibility="hidden";
}

function toogleMenu( targetId ) {
	target = document.getElementById( targetId );
    target.style.visibility="visible";
	
	target.onmouseover = function() {
	  target.style.visibility = 'visible';
	}  
	target.onmouseout = function() {
	  target.style.visibility = 'hidden';
	} 
}