drop-down list should allow the user to type the first couple of letters to position the list near the desired selection

Hi,
I am working on activewidgets. Actually my problm is, i am using drop-down in grid. And i want drop-down list should allow the user to type the first couple of letters to position the list near the desired selection. And according to that the corresponding value available in drop-down should show. I just wanna to know that whether this is possible or not, If it's possible, then can anybody help me please.
Thanks.

You can use this.

grid.getCellTemplate(2,document.getElementById('hdnCurrRow').value).element().focus();
//alert(document.getElementById('hdnCurrRow').value);
this.showPopup();
//onKeyDown().focus();

Thanks. i got it. How to get. Any way thanks for reply.