<img id='Img1' src='online.jpg' width='432' height='100' style='position:absolute; top:348px; left:33px;' onload="fadeOpacity(this.id, 'rule01')" />
<script type="text/javascript">
fadeOpacity.addRule('rule01', 0.0, 1, 30);
</script>
Скрипт:
http://szr4.com/stuff/opacity.js