function aufblendenalt(bild)
{
//app = navigator.appName;
//if (app == 'Microsoft Internet Explorer'){
bildle=new Image();
bildle.src=""+bild;
breite=bildle.width;
hoehe=bildle.height;
//alert (breite);
//alert (hoehe);
breiteschirm = screen.width;
hoeheschirm = screen.height;
var xposition = (breiteschirm - breite) /2;
var yposition = (hoeheschirm - hoehe) /2;
xposition = (Math.round (xposition));
yposition = (Math.round (yposition));
fenster2= window.open("","fenschterle", 'width=1,height=1,scrollbars=no, left='+xposition+',top='+yposition+'');
fenster2.document.open();
fenster2.document.write("Vergößerung");
fenster2.document.write("![](./"+bild+")
");
fenster2.document.write("");
fenster2.document.close();
fenster2.resizeTo(breite,hoehe);
fenster2.focus();
}