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Schutz durch transparentes GIF.

HTML-Code:
<!-- Anfang Code-->
<div class="container">
<div class="blank"><img src="blank.gif" width="100px" height="100px" alt="" /></div>
<div class="img"><img src="bild.jpg" alt="" /></div>
</div>
<!-- Ende Code-->

CSS-Code:
<!-- Anfang Code-->
.container { position: relative; }
.blank { position: absolute; z-index: 10; }
.img { position: absolute; z-index: 1; }
<!-- Ende Code-->
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