function popUp(v_url, v_win_name, v_width, v_height, v_scroll, v_resize) {

  var winTop          = ((screen.height - 44) - v_height) / 2;

  var winLeft         = (screen.width - v_width) / 2;



  // Set the popup windows options

  var popUpOptions = "scrollbars=" + v_scroll +

                     ",resizable=" + v_resize +

                     ",top=" + winTop +

                     ",left=" + winLeft +

                     ",width=" + v_width +

                     ",height=" + v_height;

                     

  // Create the window

  popUpWin = window.open(v_url, v_win_name, popUpOptions);



  // If the window exists, then just make it the focus

  if (parseInt(navigator.appVersion) >= 4) {

    popUpWin.window.focus();

  }



  return popUpWin;

}