I found a nice ajax/jquery infinite scroll plugin ( http://hycus.com/2011/03/15/infinite-scrolling-like-new-twitter-with-php-mysql-jquery/ ) that I was able to mold well to
Would the above code example with the following mods work to trigger the function at a fixed height from the bottom??
Add:
var trigger = $('#postswrapper').height() - 250;
And change:
if (st >= 0.7*h && !loading && h > 500) {
to:
if ((st == trigger) && (!loading) && (h > 500)) {