Find any element with :before pseudo element

gistfile1.js

/**
 * Requires jquery or sizzle
 * 
 * Webkit compatible
 * Firefox requires comparison of result of getComputedStyle to that of an
 * unstyled element, since it's length is always non-zero 0
 */
$('*').filter(function(){return getComputedStyle(this, ':before').length != 0});