Please refer to demo on this page for the dropdown of "Region"
As you type a letter or two it highlights a value and that value is displayed in the textbox of combobox.
I have used exactly same properties but this feature is not accomplished, as a result of which on tab press, the value of combobox goes to default one.
But if I select using mouse it works that time and for other attempts going ahead.
Please help me in this regard. Below is my code