function get_cat1(CAT) {
  var myAjax = new Ajax.Request(
    "sel_build.php?action=catblu&value="+ CAT +"",
    { method: 'get', onComplete: zeige_datum }

  );
}

function zeige_datum( originalRequest ) {
   document.getElementById('output').innerHTML = originalRequest.responseText;
   }

 function get_cat2(CATE) {

  var myAjax = new Ajax.Request(
    "sel_build.php?action=catblu2&valuee="+ CATE +"",
    { method: 'get', onComplete: zeige_datum2 }
  );
}

function zeige_datum2( originalRequest ) {
   document.getElementById('output2').innerHTML = originalRequest.responseText;
   }


 function get_cat3(CATA) {

  var myAjax = new Ajax.Request(
    "sel_build.php?action=catblu3&valuea="+ CATA +"",
    { method: 'get', onComplete: zeige_datum3 }
  );
}

function zeige_datum3( originalRequest ) {
   document.getElementById('output3').innerHTML = originalRequest.responseText;
   }