newWindow="";
function OpenNewWindow(Picture,Pwidth,Pheight,Alttext) {
xsize = Pwidth+1;
ysize = Pheight+25;
ScreenWidth = screen.width;
ScreenHeight = screen.height;
xpos = (ScreenWidth/2)-(xsize/2);
ypos = (ScreenHeight/2)-((ysize+50)/2);
if (!newWindow.closed && newWindow.location) {newWindow.close();}
html = (''+Alttext+'
Fenster schließen
');
newWindow=window.open("","Picture","height="+ysize+",width="+xsize+",resizable=yes,top="+ypos+",left="+xpos+"");
newWindow.document.open("text/html", "replace")
newWindow.document.write(html)
newWindow.document.close()
return false;
}