// this is a small helper extension i stole from
	// http://www.texotela.co.uk/code/jquery/reverse/
	// it merely reverses the order of a jQuery set.
	$.fn.reverse = function() {
		return this.pushStack(this.get().reverse(), arguments);
	};
	
	// create two new functions: prevALL and nextALL. they're very similar, hence this style.
	$.each( ['prev', 'next'], function(unusedIndex, name) {
		$.fn[ name + 'ALL' ] = function(matchExpr) {
			// get all the elements in the body, including the body.
			var $all = $('body').find('*').andSelf();
	
			// slice the $all object according to which way we're looking
			$all = (name == 'prev')
				 ? $all.slice(0, $all.index(this)).reverse()
				 : $all.slice($all.index(this) + 1)
			;
			// filter the matches if specified
			if (matchExpr) $all = $all.filter(matchExpr);
			return $all;
		};
	});