function popup (img,sx,sy,pagetitle,host)
{
var winl = (screen.width-sx)/2;
var wint = (screen.height-sy)/2;
image = '
';
popupwin= window.open("","photo","toolbar=no,location=no,directories=no,status=no,menubar=no,top="+wint+",left="+winl+",width="+sx+",height="+sy+"");
popupwin.document.write('' + pagetitle +'');
popupwin.document.write('' + image + '
');
popupwin.document.close();
}