Stack Overflow Question Tag Textbox

I'm looking to implement something similar to the Tags textbox on Stack Overflow.

Ideally, the tag suggestions will come directly from the database or else be loaded straight from the database and multiples can be selected. I'd like to be 开发者_如何转开发able to insert values to the database if they're not contained in the dataset.

Anyone have any good implementations of this that I can refer to?

You can use JQuery Autocomplete plugin.

Documentation of Autocomplete

Demo for Autocomplete

This plugin looks like it might do the job: http://loopj.com/jquery-tokeninput/

Disclaimer: I've never used it, and have made the above statement based on face value only.