Where can I find a decent transparent ajax spinner?

Question

I am trying to find a decent transparent ajax spinner that looks good on any background. I've gone to ajaxload.info and other various generator sites, but none of them look good on a dark background. Anyone know where I can get a TRANSPARENT spinner?

Answer 1

I recently switched to PNG sprites that support alpha channel transparency:

(generated using http://preloaders.net/ )

Even though they require a tiny javascript loop that changes the offset of the background image, I found them quite useful, especially when submitting (POST) forms to the server (animation of normal GIFs often stops in that case). Also, legacy browsers support it better than rotating or drawing custom elements.

    var counter = 0;
    setInterval(function() {
        var frames=12; var frameWidth = 15;
        var offset=counter * -frameWidth;
        document.getElementById("spinner").style.backgroundPosition=offset + "px 0px";
        counter++; if (counter>=frames) counter =0;
    }, 100);

Example: http://jsfiddle.net/Ekus/dhRxG/