There are many great jQuery plugins for creating tooltips, but for simple cases only a few lines of code are needed.
Here is a very simple and basic live-preview for comments and contact forms.
Here is an old script that’s just too precious to throw away, so here it is for the sake of reference and utter amusement.
Couple of quick snippets for you today.. here’s how to display spamless email links on your web pages using either PHP or jQuery.
Technically cross-domain posting is not allowed, but here is a workaround that may prove useful for your brainstorming sessions. Note that this technique is aimed at advanced developers.