function hideall(items){
  document.getElementById('back').style.display='none';
  for (count=1; count<items; count+=1){
  document.getElementById('box'+count).style.display='none';   
  document.getElementById('menu'+count).style.display='none';
  }
}

function showbox(number){
  document.getElementById('menu' + number).style.display='block';
  document.getElementById('box' + number).style.display='block';
  document.getElementById('back').style.display='block'; 
}



function showmenus(items){
  for (count=1; count<items; count+=1) 
  {
     document.getElementById('menu'+count).style.display='block';
  }
	
}