// JavaScript Document

function validateFormOnSubmit(theForm) {
var reason = "";

  reason += validateEmpty(theForm.cursom);
  reason += validateEmpty(theForm.nombre);
  reason += validateEmpty(theForm.apellidos);
  reason += validateEmpty(theForm.direccion);
  reason += validateEmpty(theForm.cp);
  reason += validateEmpty(theForm.localidad);
  reason += validateEmpty(theForm.provincia);
  reason += validateEmpty(theForm.pais);
  reason += validatePhone(theForm.telefono);
  reason += validateEmail(theForm.email);
      
  if (reason != "") {
    alert("Los campos en color amarillo necesitan correccion:\n" + reason);
    return false;
  }

  alert("Todos los campos estan completados correctamente.");
  return true;
}
function validateEmpty(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow';
        error = "El campo requerido no ha sido rellenado.\n"
    } else {
        fld.style.background = 'White';
    }
    return error;  
}
function validateUsername(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "You didn't enter a username.\n";
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
        fld.style.background = 'Yellow'; 
        error = "The username is the wrong length.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The username contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePassword(fld) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "You didn't enter a password.\n";
    } else if ((fld.value.length < 7) || (fld.value.length > 15)) {
        error = "The password is the wrong length. \n";
        fld.style.background = 'Yellow';
    } else if (illegalChars.test(fld.value)) {
        error = "The password contains illegal characters.\n";
        fld.style.background = 'Yellow';
    } else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
        error = "The password must contain at least one numeral.\n";
        fld.style.background = 'Yellow';
    } else {
        fld.style.background = 'White';
    }
   return error;
}  
function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);         // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "Usted no completo una direccion email.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Por favor, introduzca una direccion de email correcta.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "La direccion de email contiene caracteres erroneos.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (fld.value == "") {
        error = "No ha introducido un numero de telefono.\n";
        fld.style.background = 'Yellow';
    } else if (isNaN(parseInt(stripped))) {
        error = "El numero de telefono contiene caracteres erroneos.\n";
        fld.style.background = 'Yellow';
    } else if (!(stripped.length == 9)) {
        error = "El numero de telefono es erroneo. Introduzca 9 digitos.\n";
        fld.style.background = 'Red';
    } else {
        fld.style.background = 'White';
    }
    return error;
}