function prospekt_open()
{
 if(navigator.appName == "Netscape"); 
 MeinFenster = window.open("Prospekt.htm","Download_Hotelprospekt","width=600,height=280,resizable=no");
 MeinFenster.focus();
 MeinFenster.moveTo(screen.width/2-300,screen.height/2-140); 
 }