[b]refresh control without postback[/b]

[Blazeme]

Hi,<BR><BR>I have a .aspx page, which has a dropdownlist (database bound) and a link next to it, which when clicked opens a showmodaldialog window. It has a text box in which when user enters a value saves back to database. After closing the window. I need to refresh the dropdown box so that the new value shows in the dropdown list control. I want to do this without validating all other controls or refreshing back the whole page.<BR><BR>How can I do that. Any code example would be appreciated.<BR><BR>Thanks in advance