I.E. 9.0 vs Firefox 14.1

Could someone tell me why this works in Firefox and not in I.E.?
Either onclick or onchange - the screen comes back exactly like it was before qty is changed in I.E..  I've tested and the input qty is not getting passed to the javascript - it remains the same as it was before it was changed.  I've tried getelementsbyname - it doesn't work either - same exact problem.  

<script type="text/javascript">
function qtychg(ind)
{
  var i = ind;
  var sqty = "qty"+i;
  var qty=document.getElementById(sqty).value;
  var slink = "ordercc.asp?Qty"+i+"="+qty;
  document.forms[0].action=slink;
  document.forms[0].submit();
}
</script>
<%
for i = 0 to 100
      Qtyx = "Qty"&i
if request(Qtyx) <> "" then
      qty=request(Qtyx)
else
      Qty = request.form(Qtyx)
end if
%>
<td   width="50"  align=center bgcolor="<%=bgcolr%>"><font style="font-size:14px;color:#898989;font-family:Arial"><b>
<input type=text id="qty<%=x%>" value="<%=Qty%>" name="qtyx<%=x%>" size=1 onchange="qtychg('<%=x%>')"><img src=images/down.jpg  style=vertical-
align:middle; onclick="qtychg('<%=x%>');" width=12 height=16></b>
</td>
<% next %>