function VisualizzaImmagine(url,t,x,y)
{
var w,s;
if (t==null) { t=url; }
if (x==null) { x=500; }
if (y==null) { y=500; }
w=window.open("","","toolbar=no,location=no,status=no,menubar=no,resizable=yes,scrollbars=no,width="+x+",height="+y+",left="+((screen.width-x)/2)+",top="+((screen.height-y)/2))
s=""+ t +"![© regal](" + url + ")
"
w.document.write(s)
w.document.close()
}