Making a selected option visible: JavaScript

Making a selected option visible

Hi
have a drop-down that's being populated dynamically using JavaScript with static HTML. After a user makes a selection from one of the page elements, I need to update the others and retain the user's previous selection.
The problem I'm encountering is that I'm able to able to re-select the correct OPTION tag using JavaScript, but it after the refresh the selected option is no longer in view. This causes confusion, and when the user scrolls down he might accidentally deselect the option.

Is there a way to advance the dropdown list so that the selected option is visible again after I repopulate it?

Thanks.
Thanks.

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Actually, I've come across code here http://radio.javaranch.com/pascarello/2006/04/03/1144080372141.html
that seems to do the trick. How would I refactor this function so it can be used on multiple dropdowns?
Thanks.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"  
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
    <title> Eric Pascarello Example</title>
  </head>
  <body>
    <form id="test">
      <select name="select1"  multiple="multiple" size="3">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
        <option>6</option>
        <option>7</option>
        <option>8</option>
        <option>9</option>
        <option>10</option>
      </select>
      <br/>
      <input type="button" name="b1" value="select 6 on top" onclick="SelectOptionTop(5)">
    </form>
    <script type="text/javascript">
      function SelectOptionTop(iPick){
        var intSpot = iPick + document.forms[0].select1.size - 1;
        if(document.forms[0].select1.options.length>intSpot)
          document.forms[0].select1.selectedIndex = intSpot;
        document.forms[0].select1.selectedIndex = iPick;
      }
    </script>
  </body>
</html>

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Making a selected option visible

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