Since you only need areas of HTML that is to be within a scrollable box, I 
suggest you look at 

The Dynamic Duo - ScrollBar Script
http://www.dkrz.de/~k202039/dhtml/scrollbar/scrollbar.html
-> A Non-External File Scrollbar Script:

Using this way, you can have as many scrollable areas on one page, and you 
don't have to resort to using IFrame anymore (in your case).
And since all of your DropDOwnList & DataGrid can remain on the same page 
now, you won't have problem passing values or triggering events.

Note: In each of the scrollable areas, you can put anything in it, 
uncluding DataGrid, DataList...


Previous message:
>Can anyone help me please. I have an 'aspx' page with a DropDownList. The 
page also has an Iframe object which connects to another 'aspx' page. This 
second page has a DataGrid which needs to be populated according to the 
values chosen on the droplist (in the 1st page). How can that be done ? 
Also, can DataGrids have scroll bars (not the paging option, I was looking 
for a scrollbar, that's why I used the Iframe in the first place) ?

thanx very much

Satish