I don't know whether it is possible or not.
Here , what I have & what I to do is :
I have a web page( JSP ,if it matters) having excel object embedded on it.I am able to access that object in my JavaScript code......but that is not enough.I have to place a list box [items are predefined] on a particular Column so that user can choose from the list.
Here is that code part

Code:
<object classid="CLSID:0002E551-0000-0000-C000-000000000046" id="ActiveX" >
<param name="some..." value="some.."   >
</object>

<script language="JavaScript">
var Excel = document.getElementById("ActiveX");
Excel.range('a1').value="Hello";
</script>

That's all.
Please don't suggest me to follow Dojo or any ready made Tools for grid.I have to place only Excel Object.
Thnaks,
VijayS.