// Create Sub Menus 
//var myLayerCurr;
function unit_select(id) 
{ 
    myLayerCurr = document.getElementById(id); 
    myLayerCurr.style.visibility='visible'; 
	myLayerCurr.style.display='inline';	
}

function hideAllLayers() {
	l1 = document.getElementById('layer1');
	l2 = document.getElementById('layer2'); 
	l3 = document.getElementById('layer3'); 
    l1.style.visibility='hidden'; 
    l2.style.visibility='hidden';
    l3.style.visibility='hidden'; 
    l1.style.display='none'; 
    l2.style.display='none';
    l3.style.display='none'; 
}