How can I create a footer/toolbar in an iPhone web app?

Question

I'm working on a web app and I need to get a div to stick to the bottom of the viewport. Always viewable and always on the bottom of the viewport. There's an example of what I want here: footer. Unfortunately, this doesn't work on the iPhone. I can think of some ways to do this using javascript but I would rather not. Any ideas on how to get this effect on the iPhone using only css?

Answer 1

This situation has changed with iOS 5. Now you can use overflow:scroll or position:fixed and it will do what is expected. For example, this type of code:

<header style="
    position: fixed; top: 0; left: 0;
    width: 100%; height: 20px; font-size: 20px">
    Heading
</header>
<article style="margin: 20px 0">
    Your page here
</article>
<footer style="
    position: fixed; bottom: 0; left: 0;
    width: 100%; height: 20px; font-size: 20px">
    Footer
</footer>

...should work without problems. Though there are still many devices running older iOS versions, so you might want to lazy-load Scrollability on older devices, which you can test with this javascript:

var isios = navigator.appVersion.match(/CPU( iPhone)? OS ([0-9]+)_([0-9]+)(_([0-9]+))? like/i);
// if that succeeds, it usually returns ["CPU OS X_Y_Z like",undefined,X,Y,Z]
if (isios && isios[2] < 5){
    // load scrollability here. jquery example:
    $.getScript("/js/scrollability.min.js", function() {
        // code to run when scrollability's loaded
    }
}