function Foto(img,txt,width,height) {
foto1 = document.createElement('img');
foto1.src = img;
if(!txt) {txt=img}
vars="width="+width+",height="+height+",left="+((screen.width-width)/2)+",top="+((screen.height-height)/2);
newwindow=window.open("","newwindow",vars);
newwindow.document.clear();
newwindow.document.write("\n\n"+txt+"\n");
newwindow.document.write("\n");
newwindow.document.write("\n\n\n");
newwindow.document.write("![](\""+img+"\")
\n");
newwindow.document.write("\n\n");
if(newwindow.document.focus) {newwindow.document.focus();}
newwindow.document.close();
}