function writeDynaList( selectParams, source, key, orig_key, orig_val ) {
    var html = '\n    <select ' + selectParams + '>';
    var i = 0;
    for (x in source) {
 if (source[x][0] == key) {
     var selected = '';
     if ((orig_key == key && orig_val == source[x][1]) || (i == 0 && orig_key != key)) {
   selected = 'selected="selected"';
     }
     html += '\n  <option value="'+source[x][1]+'" '+selected+'>'+source[x][2]+'</option>';
 }
 i++;
    }
    html += '\n    </select>';

    document.writeln( html );
}

var ds = new Array;
//ds[]= new Array ( 'grupa-id z poprzedniego selecta','id','wartosc' );

/np dla drugiego selecta

ds1[0] = new Array ( '1','293','war0' );
ds1[1] = new Array ( '1','292','war1' );
ds1[2] = new Array ( '1','291','war2' );
ds1[3] = new Array ( '1','284','war3' );
ds1[4] = new Array ( '1','283','war4' );
ds1[5] = new Array ( '1','282','war5' );
ds1[6] = new Array ( '2','258','war6' );
ds1[7] = new Array ( '2','175','war7' );
ds1[8] = new Array ( '2','164','war8' );
ds1[9] = new Array ( '2','6','war9' );
ds1[10] = new Array ( '3','341','war10' );
ds1[11] = new Array ( '3','340','war11' );
ds1[12] = new Array ( '3','333','war12' );
ds1[13] = new Array ( '3','332','war13' );

//oraz dla 3-ego selecta analogicznie tabela z danymi

[HTML] pobierz, plaintext 
<select name="dds0" onchange="changeDynaList( 'dds1', ds1, document.form.ds0.options[document.form.ds0.selectedIndex].value, 0, 0);">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
 
 
<select name="dds1" onchange="changeDynaList( 'dds2', ds2, document.form.dds1.options[document.form.dds1.selectedIndex].value, 0, 0);"></select>
 
 
<select name="dds2"></select>
 
<!--na koniec przycisk wysyłający-->
<input type="submit" name="send" value="Wyślij">
[HTML] pobierz, plaintext