function mostrarProfesor(id)
   {
   	  ocultarProfesores();
      document.getElementById(id).style.visibility = 'visible';      
   }

function ocultarProfesores()
   {
      document.getElementById('profesor1').style.visibility = 'hidden';      
      document.getElementById('profesor2').style.visibility = 'hidden';      
      document.getElementById('profesor3').style.visibility = 'hidden';      
      document.getElementById('profesor4').style.visibility = 'hidden';      
      document.getElementById('profesor5').style.visibility = 'hidden';      
      document.getElementById('profesor6').style.visibility = 'hidden';      
      document.getElementById('profesor7').style.visibility = 'hidden';      
      document.getElementById('profesor8').style.visibility = 'hidden';      
      document.getElementById('profesor9').style.visibility = 'hidden';                                                      
   }
      
function cerrarPopup(id)
   {
      document.getElementById(id).style.visibility = 'hidden';      
   }