title: Calling Managed bean function without changing page
body: <p>In JSF 2.2 whenever I have a line like in a xhtml page: <code>&lt;h:commandButton value="Click Me!" action="whatever" /&gt;</code>. Clicking this button causes the browser to "move forward" so that I can click the back button and remain on that xhtml page. That means when I click the commandButton ten times I can go back ten times by pressing the back button of the browser.
  What can I do to make the button not changing the page? I want to be able to click on such a button and in some cases change the page and in some stay on the current one without making a step in history of the browser.</p>