<script language="JavaScript"> <!-- op_text = new Array(); op_text[1]="あいうえお,かきくけこ,さしすせそ"; op_text[2]="たちつてと,なにぬねの,はひふへほ,まみむめも"; op_text[3]="やゆよ,らりるれろ,わをん"; op_value = new Array(); op_value[1]="a,k,s"; op_value[2]="t,n,h,m"; op_value[3]="y,r,w"; function change_option(index){ var op_tmp1 = op_text[index].split(","); var op_tmp2 = op_value[index].split(","); document.aForm.op1.options.length = op_tmp1.length; for (i=0;i<op_tmp1.length;i++){ document.aForm.op1.options[i].text = op_tmp1[i]; document.aForm.op1.options[i].value= op_tmp2[i]; } document.aForm.op1.options[0].selected = true; } //--> </script>