Quick snippet in case this helps somone, because I’ve been stuck for an unreasonable amount of time on something that should have been straight-forward!

If you’re using the pageshow or pagehide event handling in jQuery mobile, you can find out which ‘pages’ the event is switching between. We can then inspect the object to find out the id of the page. First declare your function with two arguments as such:

function(event, ui) {...}

Now interrogate the passed “ui” variable as such (edit: updated to be much simpler):

$(ui.prevPage).each(function (){alert(this.id)})

ui.prevPage[0].id

I finally worked this out with a bit of reflection. To get more info about the ui.prevPage object, try passing it to this function:

function var_dump(object) {

    for (var member in object) {

        alert('Name: ' + member);

        alert('Value: ' + object[member]);

    }

}

An alternative, and actually what I’d now recommend,  would have been sticking a breakpoint inside the function and examining the “ui” object from your debugger (Firebug, WebKit Developer Tools, etc).