Wicket StopFormSubmitBehaviour: allows non Ajax form submits (e.g. return press) to go via Ajax route

gistfile1.java

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.html.IHeaderResponse;

/**
 * Behavior to allow non ajax form submits (eg press return) to go via the Ajax
 * submit route. Note that it requires the prototype.js javascript library.
 * 
 * @author <a href="http://richard-wilkinson.co.uk/2008/04/05/how-to-stop-non-ajax-form-submits-in-wicket/">Richard Wilkinson</a>
 *
 */
public class StopFormSubmitBehaviour extends AbstractBehavior {
	private static final long serialVersionUID = 5738925186056794947L;
	private Component submitButton;
	private Component form;

	public StopFormSubmitBehaviour(Component submitButton){
		this.submitButton = submitButton;
		submitButton.setOutputMarkupId(true);
	}

	@Override
	public void bind(Component component) {
		super.bind(component);
		component.setOutputMarkupId(true);
		this.form = component;
	}

	@Override
	public void renderHead(IHeaderResponse response) {
		super.renderHead(response);
		response.renderOnDomReadyJavascript(getScript());
	}

	protected String getScript(){
		StringBuilder js = new StringBuilder();
		js.append("$('").append(form.getMarkupId()).append("').observe('submit', function(e){Event.stop(e); $('")
		.append(submitButton.getMarkupId()).append("').onclick(null);});");
		return js.toString();
	}
}