DwtButton

Methods setMenu(menuOrCallback, shouldToggle, followIconStyle) Adds a dropdown menu to the button, available through a small down-arrow.

• @param menuOrCallback The dropdown menu or an AjxCallback object. If a

                          callback is given, it is called the first time the
                         menu is requested. The callback must return a valid 
                         DwtMenu object.

• @param shouldToggle
• @param followIconStyle style of menu item (should be checked or radio style) for
• which the button icon should reflect the menu item icon
• /

DwtButton.prototype.setMenu = function(menuOrCallback, shouldToggle, followIconStyle)