$('#info').click(function(){ openPage("info.html") } );
  $('#home').click(function(){ openPage("home.html") } );
}

function openPage(page){
  $('#content').load(page);
  location.hash = page;
}

function addFooter(msg){
  $('#footer').html($('#footer').html() + "<p>FOOTER: " + msg + "</p>");

            <input type="text" name="query" value="aaa">
            <input type="hidden" name="secret" value="xxx">
            <input type="submit" name="Submit">
        </form>
    </div>
	<a href="#" onclick="addFooter('XXX')">Footer</a>
	<div id="footer">
	</div>
</body>