function openimg(myurl,mx,my,name)
 {
  if (a!=null){a.close();}
  mx=mx+30;
  my=my+57;
  if(name==null){name="sv";}
  nn4 = (document.layers)? true : false;
  ie4 = (document.all)? true : false;
  wx = Math.round((screen.width - mx) / 2);
  wy = Math.round((screen.height - my) / 2);
  wpos = (nn4)? "screenX="+wx+",screenY="+wy : "left="+wx+",top="+wy;
  var a = window.open(myurl,name,"resizable=no, menubar=no,toolbars=no,scrollbars=no,width="+mx+",height="+my+"," + wpos);
  a.resizeTo(mx, my);
  a.focus();
 }