function display()
{
  if(document.getElementById('long_lead_checkbox').checked == true){
    document.getElementById('long_lead').style.display = 'block';
  } else {
    document.getElementById('long_lead').style.display = 'none';
  }
}

function display2(element,style)
{
  document.getElementById(element).style.display = style;
}

function validateLeadForm()
{
  if(document.getElementById('email_lead').value == ""){
    alert("Podaj adres e-mail!");
    document.getElementById('email_lead').focus();
    return false;
  }

   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.getElementById('email_lead').value;
   
   if(reg.test(address) == false) {
      alert('Adres e-mail nie jest poprawny!');
      return false;
   }
  
  if(document.getElementById('pass_lead').value == ""){
    alert("Podaj hasło!");
    document.getElementById('pass_lead').focus();
    return false;
  }

  if(document.getElementById('confirm_pass_lead').value == ""){
    alert("Potwierdź hasło!");
    document.getElementById('confirm_pass_lead').focus();
    return false;
  }

  if(document.getElementById('confirm_pass_lead').value != document.getElementById('pass_lead').value){
    alert("Podane hasła nie są identyczne!");
    document.getElementById('confirm_pass_lead').focus();
    return false;
  }

  if(document.getElementById('long_lead_checkbox').checked == true){

    if(document.getElementById('name_lead').value == ""){
      alert("Podaj imię!");
      document.getElementById('name_lead').focus();
      return false;
    }

    if(document.getElementById('surname_lead').value == ""){
      alert("Podaj nazwisko!");
      document.getElementById('surname_lead').focus();
      return false;
    }

    if(document.getElementById('telephone_lead').value == ""){
      alert("Podaj telefon!");
      document.getElementById('telephone_lead').focus();
      return false;
    }

    if(document.getElementById('hours_lead').value == ""){
      alert("Podaj preferowane godziny kontaktu!");
      document.getElementById('hours_lead').focus();
      return false;
    }

  }

}