Ajax combobox Suggestion in filter form

Question

 Hi

 

I am using ajax combobox in my application  and append data from database see my ComboBox

 

<asp:ComboBox ID="cmblocation" runat="server" CaseSensitive="false" CssClass="WindowsStyle" ItemInsertLocation="Append" AutoCompleteMode="SuggestAppend" DropDownStyle="DropDownList" BackColor="#f0f0f0" Width="400px">

</asp:ComboBox>

 

i want filteration  in suggestion 

my combobox items are

 

 

Car

Jeep

Metro

rail

Train

 

when i am enter  a then

Car

Rail

Train

 

these items are highlighted.