function checkForm() {
  name = document.getElementById("name").value;
  ao = document.getElementById("ao").value;
  club = document.getElementById("club").value;
  celular = document.getElementById("celular").value;
  telefono = document.getElementById("telefono").value;
  email = document.getElementById("email").value;
  entrenador = document.getElementById("entrenador").value;
  celulare = document.getElementById("celulare").value;
  emaile = document.getElementById("emaile").value;
  celularg = document.getElementById("celularg").value;
  
  var length = entrenador.length;

 
  if (name == "") {
  hideAllErrors();
document.getElementById("nameError").style.display = "inline";
document.getElementById("name").select();
document.getElementById("name").focus();
  return false;
  } else if (ao == "") {
hideAllErrors();
document.getElementById("aoError").style.display = "inline";
document.getElementById("ao").select();
document.getElementById("ao").focus();
  return false;
  } else if (club == "") {
hideAllErrors();
document.getElementById("clubError").style.display = "inline";
document.getElementById("club").select();
document.getElementById("club").focus();
  return false;
  }else if (celular == "") {
hideAllErrors();
document.getElementById("celularError").style.display = "inline";
document.getElementById("celular").select();
document.getElementById("celular").focus();
  return false;
  }else if (telefono == "") {
hideAllErrors();
document.getElementById("telefonoError").style.display = "inline";
document.getElementById("telefono").select();
document.getElementById("telefono").focus();
  return false;
  }else if (email == "") {
hideAllErrors();
document.getElementById("emailError").style.display = "inline";
document.getElementById("email").select();
document.getElementById("email").focus();
  return false;
  }else if ((entrenador == "")||(length <= 3)) {
hideAllErrors();
document.getElementById("entrenadorError").style.display = "inline";
document.getElementById("entrenador").select();
document.getElementById("entrenador").focus();
  return false;
  }else if (celulare == "") {
hideAllErrors();
document.getElementById("celulareError").style.display = "inline";
document.getElementById("celulare").select();
document.getElementById("celulare").focus();
  return false;
  }else if (emaile == "") {
hideAllErrors();
document.getElementById("emaileError").style.display = "inline";
document.getElementById("emaile").select();
document.getElementById("emaile").focus();
  return false;
  }else if (celularg == "") {
hideAllErrors();
document.getElementById("celulargError").style.display = "inline";
document.getElementById("celularg").select();
document.getElementById("celularg").focus();
  return false;
  }  
  return true;
  }
 
  function hideAllErrors() {
document.getElementById("nameError").style.display = "none"
document.getElementById("aoError").style.display = "none"
document.getElementById("clubError").style.display = "none"
document.getElementById("celularError").style.display = "none"
document.getElementById("telefonoError").style.display = "none"
document.getElementById("emailError").style.display = "none"
document.getElementById("entrenadorError").style.display = "none"
document.getElementById("celulareError").style.display = "none"
document.getElementById("emaileError").style.display = "none"
document.getElementById("celulargError").style.display = "none"
  }