jQuery: Scroll down page a set increment (in pixels) on click?

Question

I\'m trying to make a page scroll down 150px from the current position when an element is clicked. So lets say you\'re roughly halfway scrolled down a page. You click this

Answer 1

Updated version of HCD's solution which avoids conflict:

var y = $j(window).scrollTop(); 
$j("html, body").animate({ scrollTop: y + $j(window).height() }, 600);