Easyui a value that does not exist in the ComboBox input list and then returns directly

The ComboBox drop-down list has data a,b,c

However, when the user enters D and returns directly, the input box is emptied because the list does not have D

http://www.jeasyui.com/forum/index.php?topic=3831.0

The user can type text directly into the top of list. The top of list means the TextBox component. The user can enter text into the TextBox and can not make the entered text become one of the list items except so you WR Ite some code to achieve this functionality.
When enter some text and press ENTER key, the ComboBox would search and select what item hovered or selected. If No item selected, the entered text would be is cleared because the entered text does not match any items In the list.

The problem cannot be solved. Had to give up the control.

Easyui a value that does not exist in the ComboBox input list and then returns directly