Autocomplete menu items does not change by external data

Autocomplete menu items does not change by external data

Dear All,

I am using AutoComplete plugin of jQuery. but having a serious problem in my application. 

i have two textboxes. 

- first text box is for input a value
- second text box is enabled for autocomplete and autocomplete menu items will be changed after changing input value of first text box.

But, when i change input value of first text box, then i found a problem on second text box. new menu items are shown in upper layer of previous menu items. 

please see the attached image.

Please give me a solution.

Thanks,

--
Masud