Abhishek,
Yes, MyEclipse supports Jquery with intellisense. To work with it, you need to add Jquery library to the project by right clicking on project > Properties > MyEclipse > Javascript > Include Path > Libraries (tab) > Click ‘Add javascript library’ > Select Jquery Library and click Finish > Click Ok.
To check whether content assist is working, open the js file, type jQ and invoke the content assist, you should see the proposals for JQuery.
Let us know if you have any further questions.