function openwindow(url, windowName, w, h, t, l)
{
  var winAttr = "width=" + w + ",height=" + h + ",top=" + t + ",left=" + l +",menubar=1,resizable=1,scrollbars=1, location=1, status =1";
  newWin = open(url, windowName, winAttr);
  newWin.focus();
}