Mouseover Problem bei Firefox

[gast42]

<img src="images/hex3.jpg" alt="home" width="130" height="42" border="0"
    name="austausch1" onMouseOver="austausch1.src='images/b_hex3.jpg';" onMouseOut="austausch1.src='images/hex3.jpg';" usemap="#Map">

probier es mal mit
<img src="images/hex3.jpg" alt="home" onmouseover="this.src='images/b_hex3.jpg';" onmouseout="this.src='images/hex3.jpg';">