function Form1_Validator(theForm)
{
  	if (theForm.txtFirstName.value == "")
  {
    alert("Моля въведете \"Име\"");
    theForm.txtFirstName.focus();
    return (false);
  }

  	if (theForm.txtLastName.value == "")
  {
    alert("Моля въведете \"Фамилия\"");
    theForm.txtLastName.focus();
    return (false);
  }

    if (theForm.txtUser.value == "")
  {
    alert("Моля въведете \"Потребителско име\".");
    theForm.txtUser.focus();
    return (false);
  }
    if (theForm.txtPassword.value == "")
  {
    alert("Моля въведете \"Парола\".");
    theForm.txtPassword.focus();
    return (false);
  }
	if (theForm.txtPassword.value != theForm.txtConfirm.value)
	{
		alert("Двете пароли не съвпадат.");
		theForm.txtConfirm.focus();
		return (false);
	}
  	if (theForm.txtKvartal.value == "")
  {
    alert("Моля въведете \"ж.к./кв.\".");
    theForm.txtKvartal.focus();
    return (false);
  }

/*    if (theForm.txtStreet.value == "")
  {
    alert("Моля въведете \"Улица\".");
    theForm.txtStreet.focus();
    return (false);
  }

     if (theForm.txtBlok.value == "")
  {
    alert("Моля въведете \"блок, вход, ет., ап.\".");
    theForm.txtBlok.focus();
    return (false);
  }*/

txtBlok = document.getElementById('txtBlok').value;
txtStreet = document.getElementById('txtStreet').value;

if (txtBlok=='' && txtStreet=='') 
{
   // alert( 'A or B should be filled!' );
   alert("Моля въведете \"Улица\" или \"блок, вход, ет., ап.\"" );
    return false;
}


    if (theForm.txtPhone.value == "")
  {
    alert("Моля въведете \"Телефон\".");
    theForm.txtPhone.focus();
    return (false);
  }

	if (theForm.txtEmail.value == "")
  {
    alert("Моля въведете \"e-mail\".");
    theForm.txtEmail.focus();
    return (false);
  }

/*	if (theForm.username.value == "")
  {
    alert("Please enter a value for the \"username\" field.");
    theForm.firstname.focus();
    return (false);
  }
	*/

}