I have been adding google maps support to the web application, i found it more easy than i thought =).

Google maps integration working features:  search and name suggestion, drag marker, click to add marker and display devices on map.

Also using JQuery to load dynamic content, i made the drop down lists (location, building and place) be connected, and also finished the add more functionalities.

JQuery is nice for handling events, load content without refreshing, and much more.
JSON short for java script object notation, is a lightweight data format to interchange between applications

New screenshots.