Hallo!
<html>
<head>
<script type="text/javascript">
<!--
function uebergabe() {alert(this.src)}
//-->
</script>
</head>
<body>
<img src="bild_full.jpg" width="100" onclick="uerbergabe()">
oder:
<img src="bild_full.jpg" width="100" onclick="alert(this.src)">
</body>
</html>
alles klar?
tschüs, jürgen