I stumbled upon a couple very useful JavaScript utilities today that I though I would share.  The first is called PHP.js and the goal of this project is to implement in JavaScript all the great PHP functions we are so use to using. I came across this while thinking about how to implement an include_once type function within JavaScript.  I'm thinking I might try to help them a bit for the challenge and since I'm pretty sure this will come in quite handy in the future.

The second utility is a jQuery JavaScript plugin called Lazy Load.  The basic idea here is centers around increased load time performance. 

It delays loading of images in (long) web pages. Images outside of viewport (visible part of web page) wont be loaded before user scrolls to them.

I've used this same technique a bit in the past with the YUI Library's ImageLoader, but it's great to see that there is a similar plugin available for jQuery now too.  I tend to bounce between these two JS frameworks the most these days.