You can specify any jQuery Mobile button
data- attribute on a select element, too. In this example, we're setting the theme, icon and inline properties:
data-overlay-theme attribute can be added a select element to set the color of the overlay layer that the dialog-based custom select menus and the outer border of the smaller custom menus. By default, the content block colors for swatch A will be used for the overlays.
For the sake of advanced styling, the framework also offers a method of generating custom menus from existing select menu markup. You can optionally use custom-styled select menus instead of the native OS menu. The custom menu supports disabled options and multiple selection (whereas native mobile OS support for both is inconsistent), adds an elegant way to handle placeholder values, and restores missing functionality on certain platforms such as
optgroup support on Android.