Browsers do not support combo boxes by default (that is, Combination edit control with drop-down list). The UniCombo control in the Client Tools ASP.NET application provides this capability for the desktop browsers. However, the mobile browsers are limited in terms of overlapping controls and the result is a combination drop-down list control with the edit control placed underneath it. Even though the presentation of a combo box is different in a mobile browser, the functionality is preserved, such that the user can either type data into the edit control or select an item from the list.