Create a form to search excel spreadsheet

I need help developing a web application, “Targeted Zip Codes” - will allow people to enter a zip code to see if it is in a targeted location.  I created a form on my homepage with a text box and submit button.  The targeted zip codes are saved in an excel spreadsheet. The web page is a html, and all files are saved in the host directory.

Example

Step 1: Enter zip code: 78221

Step 2: Click the submit button

Step 3: Search "excel spreadsheet to see if 78221 is on it,

Step 4: If zip code is on spreadsheet, then display text “child lives in targeted area”, or

            If zip code is not on spreadsheet, then display text” child does not live in targeted area.