<div id="killme">Please fade!</div>

<? $gantry->addScript('fadeanddestroy.js'); ?>

div#killme {
    position: absolute;top: 0;bottom: 0;left: 0; right: 0;;
    z-index: 99999;background: red;
}

Element.implement({
fadeAndDestroy: function(duration) {
    duration = duration || 3000;
    var el = this;
    this.set('tween', {
        duration: duration
    }).fade('out').get('tween').chain(function() {
        el.dispose();
    });
}});
 
window.addEvent('domready',function() {
$('killme').fadeAndDestroy();});