Jquery mobile and google map geo location

Jquery mobile and google map geo location

Hi, I am new to Jquery/mobile and have designed a web app that serves a  non -profit  organisation . I want to add a page with a google map so users can add location markers at their discretion and add a detailed info tag  as well . I tried the demo coding at  Jquery google maps geocoding  and inserted the code into html page (updated the script url in <head>) but just shows a map with no tag facility in my local browser. I have not tried server side yet but thought it wouldn't make  a difference . Any ideas what I am doing wrong. Thanks. Zach.