Adding to existing 1 page Landing feature to Ajax display data from specified Google Spreadsheets cells NO FRAMEWORKS!!! PURE PHP!!!

Need to add to existing Landing page feature to display data from specified Google Spreadsheets cells, without refreshing webpage (Ajax) also need to add weather for specified location, also 5 days forecast, and few more features that will be discussed in private.
Attention- NO FRAMEWORKS NEED TO BE USED- ONLY PHP +JAVASCRIPT