Sending Ajax Request to a Server and getting JSON data and putting to proper table slot

Hello, I'm building a project and need some help. Here are the details for you to understand the work to be done: User selects the items from a dropdown menu which is filled by a JSON string. Program serializes the Json data for the selected items. What is going to be done: Send the selected items' ID's to the server with Ajax and fill the table. Data recieved from the server will again be a JSON string and will include the details for the table slot and what is going to be written in the table. XML file for the table will be given as well as the whole android project and the URL for the server. This project needs to be done in max. 12 hours.