How to create checkbox inside dropdown?

Question

I want to create a multiple selection dropbox list. Actually I have to select more than one option using a dropdown menu. When I simply do this as shown bellow:

Answer 1

You can always use multiple or multiple = "true" option with a select tag, but there is one jquery plugin which makes it more beautiful. It is called chosen and can be found here.

This fiddle-example might help you to get started

Thank you.