function entry(entry_type) {
 var w = 640;
 var h = 420;
 popup = window.open(entry_type+"/index.html","Merlini","directories=0,location=0,menubar=0,personalbar=0,resizable=0,scrollbars=0,status=0,titlebar=0,toolbar=0,width="+String(w)+",height="+String(h)+",left="+String(Math.floor(screen.width/2-w/2))+",top="+String(Math.floor(screen.height/2-h/2)-20));
}