function pop(uri,w,h) {
var posW = (screen.availWidth-w) / 2;
fenster = window.open("","Bilderschau","width="+w+",height="+h+",scrollbars=no,resizable=no,toolbar=no,directories=no,location=no,menubar=no,status=no,left="+posW+",top=20");
fenster.document.open();
fenster.document.write('Bilderschau');
fenster.document.write('![\"\"](\"'+uri+'\" "\\"Klicken")
');
fenster.document.write('');
fenster.document.close();
fenster.focus();
return false;
}