<script type="text/javascript"><!--
list1= new Array("LIST1_1","LIST1_2","LIST1_3","LIST1_4");
list2= new Array("LIST2_1","LIST2_2","LIST2_3","LIST2_4","LIST2_5","LIST2_6","LIST2_7");
list3= new Array("LIST3_1","LIST3_2","LIST3_3","LIST3_4","LIST3_5");
baselist= new Array(list1,list2,list3);
function sel(setform,no){
setform.s_list.length=baselist[no].length;
for(i=0;i<baselist[no].length;i++){
setform.s_list.options[i]=new Option(baselist[no][i],"");
}
}/* himajin.moo.jp */
// --></script>
<FORM>
<INPUT type=button value="LIST1"onClick="sel(this.form,0)">
<INPUT type=button value="LIST2"onClick="sel(this.form,1)">
<INPUT type=button value="LIST3"onClick="sel(this.form,2)">
<br><SELECT name="s_list"style="width:100px;">
<option>
</SELECT>
</FORM>