Just to answer myself: I managed to get a special click behaviour using the below Javascript in
the docinfo.html file.
A link like
link:{srcbase}/{srcdir}/Hello.java[Hello.java, role="red", window="_new"]
is now opened in a new window(!) not tab and following clicks are going into the very same window.
The docinfo.html content:
<script src="http://code.jquery.com/jquery-2.1.3.min.js"></script>
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery('a[target^="_new"]').click(function(e) {
var width = 600;
var height = 400;
window.open(this.href, 'newwindow', 'width=' + width + ', height=' + height + ', top=50, left=500');
return false;
});
});
</script>