Are you using JavaScript or jQuery besides the html? If you are, you can do something like:
HTML:
<select id='some_selector'></select>?
jQuery:
var select = '';
for (i=1;i<=100;i++){
select += '<option val=' + i + '>' + i + '</option>';
}
$('#some_selector').html(select);
As you can see here.
Another option for compatible browsers instead of select, you can use is HTML5's input type=number
:
<input type="number" min="1" max="100" value="1">