Keystroke Event On Combobox

I'm using a VB combo box in an ASP/VBScript app

<OBJECT ID="cmbLocation" NAME="cmbLocation" WIDTH=238 HEIGHT=23 CLASSID="CLSID:8BD21D30-EC42-11CE-9E0D-00AA006002f3">
<PARAM NAME="VariousPropertyBits" VALUE="746604571">
<PARAM NAME="DisplayStyle" VALUE="3">
<PARAM NAME="Size" VALUE="2540;635">
<PARAM NAME="MatchEntry" VALUE="2">
<PARAM NAME="ShowDropButtonWhen" VALUE="2">
<PARAM NAME="FontCharSet" VALUE="0">
<PARAM NAME="FontPitchAndFamily" VALUE="2">
<PARAM NAME="FontHeight" VALUE="232">
<PARAM NAME="LimitToList" VALUE="No">
</OBJECT>

I'm using the _change event to copy the combobox value to a hidden input box called txtLocation

<script type="text/vbscript">

function cmbLocation_change()
addForm.txtLocation.value = location_array(addForm.cmbLocation.listindex)
addForm.btnLocation.focus()
end function

</script>

Is there a keypress event for the combobox?