function showEquipment(equipName){
  var x = document.getElementById('model_equipment').childNodes;  
  
  for(var i = 0; i < x.length; i++){    
    if(x[i].nodeName == 'DIV'){        
      if (x[i].id == equipName)
        x[i].style.display = 'block';    
      else    
        x[i].style.display = 'none';                 
    }
  }   
}