Recently at work we found ourselves needing to act on groups of table cells in an HTML page which shared a common class attribute value. After a couple of minutes of hemming and hawing about what a whipping the by-hand JavaScript DOM code would be to write, I heard faint echoes of how great jQuery was at eliminating that whipping.  Sure enough, in another couple of minutes, after downloading the library and perusing the docs a bit, we got done the task we wanted to: turn spans within cells attributed a particular way into anchors.

If you do any JavaScript programming, you owe yourself a swim through jQuery. Perhaps your world will be rocked like mine has the past few weeks.