Drag and Drop editor question

Hi everyone,

I am currently working on a college project and I am trying to make an application similar to fanpageengine.com or lujure.com

Both of these have a list of tools or widgets in a column that can be dragged onto a canvas and used to build a facebook page.

Does anyone know what exact technologies they use? My best guess was html5, jquery and php but I’d appreciate some help in case I go down the wrong route with my project