Dizkus

var cats = new array();

<!--Begincats-->
cats["{region_de}"] = "{region_id}";
<!--Endcats-->

function set_subcat(fform,llb1,llb2,ccats) {
lb1 = document.all[llb1];
lb2 = document.all[llb2];

index = lb2.selectedIndex;
if ( index<0 ) index = null;
if (lb2.options[index] != null) {
val = lb2.options[index].value;
} else {
val = null;
}

key=lb1.options[lb1.selectedIndex].value.toString().split('#')[0];

for (i=document.forms[fform].elements[llb2].options.length; i >=0 ; i--) {
document.forms[fform].elements[llb2].options[i]=null;
}
var i = 1 ;
document.forms[fform].elements[llb2].options[i] = new Option("","",false,false);
for (iter in ccats) {
tmp = ccats[iter.toString()].split("#")[1];
tmp2 = ccats[iter.toString()].split("#")[0];
if (tmp==key) {
if (tmp2==val) {
document.forms[fform].elements[llb2].options[i] = new Option(iter.toString().split("#")[0],ccats[iter.toString()],true,true);
document.forms[fform].elements[llb2].options[i].selected = true;
}
else{
document.forms[fform].elements[llb2].options[i] = new Option(iter.toString().split("#")[0],ccats[iter.toString()],false,false);}
i++;
}
}
}

function set_subcat2 () {
set_subcat("Search","s_entry_country","s_entry_region",cats);
}

/*document.Search.s_entry_country.options[0]=null;*/
document.Search.s_entry_country.onchange = set_subcat2;

set_subcat("Search","s_entry_country","s_entry_region",cats);

<form method="GET" action="<?= $sActionFileName ?>" name="Search">
    <input type="hidden" name="FormName" value="Search"><input type="hidden" name="FormAction" value="search">
    <table class="FormTABLE">
     <tr>
      <td class="FormHeaderTD" colspan="13"><a name="Search"><font class="FormHeaderFONT"><?=$sFormTitle?></font></a></td>
     </tr>
     <tr>
      <td class="FieldCaptionTD"><font class="FieldCaptionFONT">Land</font></td>
      <td class="DataTD"><select size="1" name="s_entry_country">
<?
    echo "<option value=\"\">" . $ss_entry_countryDisplayValue . "</option>";
    $lookup_s_entry_country = db_fill_array("select country_id, country_de from ts_countries order by 2");

    if(is_array($lookup_s_entry_country))
    {
      reset($lookup_s_entry_country);
      while(list($key, $value) = each($lookup_s_entry_country))
      {
        if($key == $flds_entry_country)
          $option="<option SELECTED value=\"$key\">$value";
        else
          $option="<option value=\"$key\">$value";
        echo $option;
      }
    }
   
?></select></td>
     </tr>
     <tr>
      <td class="FieldCaptionTD"><font class="FieldCaptionFONT">Region</font></td>
      <td class="DataTD"><select name="s_entry_region">
<?
    echo "<option value=\"\">" . $ss_entry_regionDisplayValue . "</option>";
    $lookup_s_entry_region = db_fill_array("select region_id, region_de from ts_regions order by 2");

    if(is_array($lookup_s_entry_region))
    {
      reset($lookup_s_entry_region);
      while(list($key, $value) = each($lookup_s_entry_region))
      {
        if($key == $flds_entry_region)
          $option="<option SELECTED value=\"$key\">$value";
        else
          $option="<option value=\"$key\">$value";
        echo $option;
      }
    }
   
?></select></td>

$db->query("select region_id,country_id,region_de from ts_regions order by region_de");

   $tpl->set_var("region_id","");
   $tpl->set_var("region_de","Alle");
   $tpl->parse("cats",true);

while ($db->next_record())  {
   $tpl->set_var("region_id",$db->f("region_id")."#".$db->f("country_id"));
   $tpl->set_var("region_de",$db->f("region_de")."#".$db->f("region_id"));
   $tpl->parse("cats",true);
}

<?
$cats_hack = db_fill_array("select concat(region_de,'#',region_id), concat(region_id,'#',country_id) from ts_regions order by region_de");
echo 'cats["Alle"] = "";';
    if(is_array($cats_hack))
    {
      reset($cats_hack);
      while(list($key, $value) = each($cats_hack))
      {
echo 'cats["'.$key.'"] = "'.$value.'";';
      }
    }
?>