//Submenu for airlab website - tree type menu.
function show(id) {
var d = document.getElementById(id);
	for (var i = 1; i<=10; i++) {
		if (document.getElementById('smenu'+i)) {
				document.getElementById('smenu'+i).className='off';}//sets class name of dd to off - in css makes it display:none;
		}
}

function showClick(id) {
var d = document.getElementById(id);
if (d){
	if (d.className=='off') {d.className='on';}
		else {d.className='off';} //if the classname is off then make it on, or else make it off.
	
	}
	if (document.getElementById('t' + id).className=='') {document.getElementById('t'+id).className='down';}
		else {
			document.getElementById('t'+id).className='';
		}
}