<!--
var state = "none";
var totalElements = 3;
var lastBtn = "";

//onload hide submenus...
function hideAllSubMenus(){
	n = 1;
	while( n <= totalElements ){
						document.getElementById( "menu" + n ).style.display = "none";
						
		n++	
	}
}

//___________________________________________________________________________________________________________________
function showhide(layer_ref) {
			
			//está um menu aberto e o utilizador volta a clicar  no mesmo btn >>> fecha esse menu
			if (state == "block" && layer_ref == lastBtn ) {
				state = "none";
				document.getElementById("menu" + layer_ref).style.display = state;
							
			//está um menu aberto e o utilizador clica  noutro btn >>> fecha TODOS E ABRE O NOVO
			}else if( state == "block" && layer_ref != lastBtn ){
				//close all
				n = 1;
				while( n <= totalElements ){
					document.getElementById( "menu" + n ).style.display = "none";
					
				n++	
				}
				
				//
				document.getElementById("menu" + layer_ref).style.display = "block";
								
				//
				state = "block";
				lastBtn = layer_ref;
						
			//estăo fechados e abre o clicado...______________________________________________	
			} else {
				//close all
				n = 1;
				while( n <= totalElements ){
					document.getElementById( "menu" + n ).style.display = "none";
					
				n++	
				}
								
				state = "block";
				
				//abrir o clicado
				document.getElementById("menu" + layer_ref).style.display = state;
				
				lastBtn = layer_ref;
				
				//alert('layer_ref::: ' + layer_ref );		
				
		}
		
		//__________________________________________________________________________________	
}
//-->