Lets filter a select box with jQuery, Sack, PHP and MySQL….. You may or may not need this, but it could come in handy at one point in time. So lets start.. I will show you the basics here, you may download the source at the bottom of the page. View the DEMO index.html include these into the head section of the page. ajax.js is the Sack js functions. I will get into Sack later. this goes into the head as well. var ajax = new...