In wicket AttributeModifier doesn't change attribute "class" for AjaxLink. It should change class attribute and change how link looks like.
public class TestPage extends WebPage { private AjaxLink link1; ...
I have two columns which are orderbyborder links. When i click one column i changed the color of column by adding attributeModifier in the following way
add(new AttributeModifier("style", true, new Model<String>("background-color:#80b6ed;")));