How do I slide left using the changePage function?

How do I slide left using the changePage function?

Hi everybody,

I have searched and tried to find a way to get the transition to slide left when I use the changePage function. What I'm doing is using the swipe function to change page. My code looks like this:

$(".map").bind("swipeleft", function(){
var id = $.mobile.activePage.attr("id");
var newPage = parseInt(id);
newPage++;
$.mobile.changePage("#"+newPage, "slide");
      });
       $(".map").bind("swiperight", function(){
var id = $.mobile.activePage.attr("id");
var newPage = parseInt(id);
newPage--;
$.mobile.changePage("#"+newPage, "slide");
       });

the Page is at http://aggerbo.dk/Wind/vind.html (press one of the times and swipe the map to see it in action)

Is there any way to get the animation to slide left instead of right?

Hope you can help me. Thanks!
Mathias