dhtmlxCombo contains search

How do i change the search from “begins with” style to “contains” style

Ex:

Say Currently the Options are :

Hello
Hi
Welcome
Thank You

I want to search the options if the user types “e”

How do i achieve this?

I saw in forum of modifying the dhtmlxcombo.js file can you please tell me what should i modify ,
I have the latest *.js file

myCombo.enableFilteringMode(“between”);

does the trick