function openPopUp() {
  var iMyWidth;
  var iMyHeight;
  //gets top and left positions based on user's resolution so window is centered.
  iMyWidth = (window.screen.width/2) - (335 + 10); //half the screen width minus half the new window width (plus 5 pixel borders).
  iMyHeight = (window.screen.height/2) - (210 + 10); //half the screen height minus half the new window height (plus title and status bars).
  vars ="width=" + 670 + ",height=" + 420 + ",top=" + iMyHeight + ",left=" + iMyWidth + ",scrollbars=0,toolbar=0,resizable=1,titlebar=0";
  var win2 = window.open('/flash/demo.htm','oneBG',vars);
  win2.focus();
}