Make edits to a custom jQuery plugin

*** Generic applications will be ignored *** My price comparison website has a search feature, a jQuery custom plugin that I need to change. See screenshot of the current search feature attached, or go to [login to view URL] to take a look. The new search feature will have the following elements displayed in-line, in a thin arrangement: 1- on the left, a dropdown allowing the user to select a category/subcategory 2- in the middle, a search bar to type keywords 3- on the right, a small search button with a magnifyer icon Open the brief attached for mockups and more detailed directions. The main part of this project is to build this category dropdown, and involves advanced JavaScript/jQuery knowledge. The search feature will have to be responsive and will then display fewer categories as the screen gets smaller (e.g. mobile). Also the search feature will be compatible with all internet browers. .