[cherie]

That script block does not require literal tags (no braces present).

"sp_style.php" is not a common stylesheet file. You may want to doublecheck that is correct.

jQuery should already be loaded so check that you really need that jquery.js line. Then I would load all of these script lines after jQuery loads. Your browser page source should help you see where things are placed.

I don't recommend modifying anything in skin/common_files if you can avoid it. You should have a custom skin directory and use that for making changes.

Once you've added the code check the browser page source to see if the new lines are added. If not then you're in the wrong file or you need to clear the template cache. If you can't find the right file try using Webmaster Mode.