Динамические select'ы (AJAX)

Есть отличный код для динамического вывода данных select'ов с без перезагрузки.

Код используется для поиска объектов. Все прекрасно работает, НО хоть убейте не могу понять как сделать, чтобы при показе результатов поиска в select'ы автоматически показывались (selected) выбраные ранее опшены..

<script language=Javascript>



function Inint_AJAX() {

   try { return new ActiveXObject(\"Msxml2.XMLHTTP\");  } catch(e) {} //IE

   try { return new ActiveXObject(\"Microsoft.XMLHTTP\"); } catch(e) {} //IE

   try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript

   alert(\"XMLHttpRequest not supported\");

   return null;

};



function dochange(src, val) {

     var req = Inint_AJAX();

     req.onreadystatechange = function () { 

          if (req.readyState==4) {

               if (req.status==200) {

                    document.getElementById(src).innerHTML=req.responseText; //

               } 

          }

     };

     req.open(\"GET\", \"/js/location/locale_ofc.php?data=\"+src+\"&val=\"+val); //

     req.setRequestHeader(\"Content-Type\", \"application/x-www-form-urlencoded;charset=windows-1251\"); // set Header

     req.send(null); //

}



window.onLoad=dochange('region', -1, ".$srchPat[0].", ".$srchPat[2]."); 

</script>



<font id=region><select name='region' id='region'>

<option value=''>Не важно</option>

</select></font></td>



<font id=district><select name='district' id='district'>

<option value=''>Не важно</option>

</select></font>



<font id=metro><select name='metro' id='metro'>

<option value=''>Не важно</option>

</select></font>

     //

     header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");

     header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

     header ("Cache-Control: no-cache, must-revalidate");

     header ("Pragma: no-cache");

     header("content-type: application/x-javascript; charset=windows-1251");

     $data=$_GET['data'];

     $val=$_GET['val'];



     //

$dbhost = "localhost";

$dbuser = "xxxxx";

$dbpass = "xxxxx";

$dbname = "xxxxx";

mysql_pconnect($dbhost,$dbuser,$dbpass) or die ("Unable to connect to MySQL server");  

     if ($data=='region') { 

          echo "<select name='region' onChange=\"dochange('district', this.value), dochange('metro', this.value), dochange('name', this.value)\">\n";

          echo "<option value=''>-----Выбрать-----</option>\n";

          $result=mysql_db_query($dbname,"SELECT location_ID, location_name FROM Classificator_location WHERE location_comment LIKE 'reg' order by location_name");

          while(list($id, $name)=mysql_fetch_array($result)){

               echo "<option value=\"$id\">$name</option> \n" ;

			   }

          }

	 

	if ($data=='district') {

          echo "<select name='district'>\n";

          echo "<option value=''>-----Выбрать-----</option>\n";

          $val2=$val;

          $val = substr($val,0,6);                                 

          $result=mysql_db_query($dbname,"SELECT location_ID, location_name FROM Classificator_location WHERE location_ID != '$val2' AND location_ID LIKE '$val%' AND location_comment LIKE 'disreg' ORDER BY location_name");

          while(list($id, $name)=mysql_fetch_array($result)){

               if ($id==$sel2){

               echo "<option value=\"$id\">$name</option> \n" ;

			   }

          }

   

    

	 

	else if ($data=='metro') {

          echo "<select name='metro'>\n";

          echo "<option value=''>-----Выбрать-----</option>\n";

          $val2=$val;

          $val = substr($val,0,6);                                 

          $result=mysql_db_query($dbname,"SELECT location_ID, location_name FROM Classificator_location WHERE location_ID != '$val2' AND location_ID LIKE '$val%' AND location_comment LIKE 'met' ORDER BY location_name");

          while(list($ID, $name)=mysql_fetch_array($result)){       

               echo "<option value=\"$ID\">$name</option> \n" ;

          }

     } 

	  echo "</select>\n";