function openPicture(imageName,imageWidth,imageHeight,alt) {
newWindow = window.open("","newWindow","width="+imageWidth+",height="+imageHeight+",scrollbars=no,left=0,top=0");
newWindow.document.open();
newWindow.document.write('>>>> Klicken Sie auf das Fenster um es zu schliessen! <<<<');
newWindow.document.write('![\"'+alt+'\"](\"'+imageName+'\")
');
newWindow.document.write('');
newWindow.document.close();
newWindow.focus();
}