function is_int(s)
 {
  if ((s == '0') ||
      (s == '1') ||
      (s == '2') ||
      (s == '3') ||
      (s == '4') ||
      (s == '5') ||
      (s == '6') ||
      (s == '7') ||
      (s == '8') ||
      (s == '9')) { return 1; } else { return 0; }
 }

function od_check_new_licence_format(licence)
 {

  var s = '';
  for (i = 0; i <= licence.length-1; i++)
   {
    var n = licence.charCodeAt(i);
    if (((n >= 65) && (n <= 90)) || ((n >= 48) && (n <= 57)))
     {
      s = s + licence.charAt(i);
     }
   }
  if (s.length != 6) { return licence; }

  if ((is_int(s.charAt(4)) == 0) && (is_int(s.charAt(5)) == 1))
   {
    licence = s.charAt(0) + s.charAt(1) + '-' + s.charAt(2) + s.charAt(3) + s.charAt(4) + '-' + s.charAt(5);
   }

  return licence;
 }

function od_check_licence(e)
 {
  var key = window.event ? e.keyCode : e.which;
  var keychar = String.fromCharCode(key);      
  if (key == 8) { return; }
  if (key == 13) { get_licence_data(); }
  
  var licence = document.licence_form.licence.value;
  licence = licence.toUpperCase();

  s = ''; m = 0;
  for (i = 0; i <= licence.length-1; i++)
   {
    n = licence.charCodeAt(i);
    if (((n >= 65) && (n <= 90)) || ((n >= 48) && (n <= 57)))
     {
      s = s + licence.charAt(i);
      m = m + 1;
      if (m == 2) { s = s + '-'; }
      if (m == 4) { s = s + '-'; }
     }
   }
 
  s = od_check_new_licence_format(s);
  document.licence_form.licence.value = s;
 }


function get_licence_data()
 { 
  if($("#kenteken_inputbox").val()==''){
   $("#geen_kenteken_ingevuld").show();
   $("#home_1").hide("slow");
   
   
   exit;
  }
  
  document.location.href = '/?kenteken=' + document.licence_form.licence.value;
 }