function postColors() {
	var posts = YAHOO.util.Dom.getElementsByClassName('post');
	for(var i=0;i<posts.length;i++){
		var className = "even";
		if(i%2){
			className = "odd";
		}
		YAHOO.util.Dom.addClass(posts[i], className);
	}
}
YAHOO.util.Event.onDOMReady(postColors);