function show(file) {
 MeinFenster =
 window.open(file, 'picshow', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=580,height=520,left=100,top=100');
 MeinFenster.focus();
 }

 function play(file) {
 MeinFenster =
 window.open(file, 'picshow', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=640,height=480,left=100,top=100');
 MeinFenster.focus();
 }

 function chat(file) {
 MeinFenster =
 window.open(file, 'picshow', 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=800,height=600,left=100,top=100');
 MeinFenster.focus();
 }