function open_contact_popup()
{
  	 var email = document.getElementById('contact_box_email').value;
     var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
     if(reg.test(email) == false)
     {
        document.getElementById('contact_box_error').innerHTML = 'Podany adres e-mail jest nieprawidłowy!';
        return false;
     }
     else
     {
        okno = window.open("/contact_form_view.php?email=" + email,'Formularz_kontaktowy',"scrollbars=1,resizable=1,width=450,height=490,top=0,left=224");
        okno.focus();
		}
}


function checkEnter(e)
{
  var characterCode;
  
  if(e && e.which)
  {
    e = e;
    characterCode = e.which;
  }
  else
  {
    e = event;
    characterCode = e.keyCode;
  }
  
  if(characterCode == 13)
  { 
    open_contact_popup();
    return false;
  }
  else
  {
    return true;
  }
}