<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head>
<meta content="text/html; charset=windows-1251" http-equiv="Content-Type">
<script type="text/javascript">
function f(event) {
var target = event ? event.target : window.event.srcElement;
console.log(target);
alert(target.src);
}
document.addEventListener('mousedown', f, false);
</script>
</head><body>
<a href="#"><img src="http://javascript.ru/forum/image.php?u=17648&dateline=1338577823"></a>
</body></html>
Запустите в Firefox. Всё работает
