I 'm very new in this platform, and I would like to know if is it possible to use JQuery API instead of Dojo. thx!
You can you JQuery in your application. But not instead of dojo. ESRI API has been built on top of dojo toolkit. So you need dojo.
A nice sample for this is the following
You should be able to find quite a bit of sample and information on using jquery along with esri API. In one of our application we use ESRI api for GIS functions and jQuery for requesting non-gis information and activities.
Some examples below
Retrieving data ...