function add_css_class(selector, class_name) {
	var elements = cssQuery(selector);
	for(var e = 0; e < elements.length; e++) {
		elements[e].className += " " + class_name;
	}
}
function init() {
	add_css_class("ul.buttons li:first-child", "first-child");
	add_css_class("p + h1", "sibling");
	add_css_class("p + ul.posts", "sibling");	
}