function web(){
fenster=window.open("html/web.html","fenstername","width=800,height=400,top=0,left=0,scrollbars=yes,menubar=no,status=no,toolbar=no,location=no,resizable=no")
fenster.moveTo((screen.availWidth-800)/2,(screen.availHeight-400)/2);
fenster.focus();
}

function papier(){
fenster=window.open("html/print.html","fenstername","width=800,height=400,top=0,left=0,scrollbars=yes,menubar=no,status=no,toolbar=no,location=no,resizable=no")
fenster.moveTo((screen.availWidth-800)/2,(screen.availHeight-400)/2);
fenster.focus();
}

function impressum(){
fenster=window.open("html/impressum.html","fenstername","width=800,height=400,top=0,left=0,scrollbars=yes,menubar=no,status=no,toolbar=no,location=no,resizable=no")
fenster.moveTo((screen.availWidth-800)/2,(screen.availHeight-400)/2);
fenster.focus();
}

function extern(Url){
fenster=window.open(Url,"fenstername3","width=1000,height=600,top=0,left=0,scrollbars=yes,menubar=yes,status=no,toolbar=yes,location=yes,resizable=yes")
fenster.focus();
}