Set Post form at run time in classic ASP

You can update the "action" of your form when the user selects the value from the drop-down using the "onchange" event.  This happens before the form is submitted, not "at run time"... that OK?

<select name="chooseAction" id="chooseAction" onchange="javascript:updateAction();" size="1">
  <option value="0"></option>
  <option value="1">Default Location</option>
  <option value="2">Alternate Location</option>
</select>
<script>
function updateAction(){
            var dropdown = document.getElementById("chooseAction");
            var index = dropdown.selectedIndex;
            var selectedAction = dropdown.options[index].value

            switch (selectedAction){
                case '0':{
                    //no value selected
                    document.form.action = 'stage1end_journal_public.asp';
                    break;
                }
                case '1':{
                    document.form.action = 'stage1end_journal_public.asp';
                    break;
                }
                case '2':{
                    document.form1.action = 'someOtherPage';
                    break;
                }
                default:{
                    document.form.action = 'stage1end_journal_public.asp';
                    break;
                }
            }

}
</script>

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You can trim the code above depending on whether you have a blank selection in your drop-down or not... I like to make the examples explicit and let you decide where you want to put error messages or combine the options.

perfect