// JavaScript Document Formulier Check deelnemen.php
var form_submitted = false;
function check_form() {
  form_submitted = true;
  var total_form = true;
  total_form = check_empty(document.gezochtform.content, document.getElementById('form_content'), total_form);
  total_form = check_email(document.gezochtform.email, document.getElementById('form_email'), total_form);
  return total_form;
}

function check_email(objectw, element_id, total_form){
  if (form_submitted && objectw && element_id) {
    if (objectw.value.length < 6) {
      total_form = false;
      element_id.style.display = 'block';
    } else if (objectw.value.indexOf("@") < 1) {
      total_form = false;
      element_id.style.display = 'block';
    } else if (objectw.value.length - objectw.value.indexOf("@") < 4) {
      total_form = false;
      element_id.style.display = 'block';
    } else {
      element_id.style.display = 'none';
    }
  }
  return total_form;
}

function check_empty(objectw, element_id, total_form){
  if (form_submitted && objectw && element_id) {
    if (objectw.value == "") {
      element_id.style.display = 'block';
      total_form = false;
    } else {
      element_id.style.display = 'none';
    }
  }
  return total_form;
}