// check to insure rollovers work
if (document.images)
{
  // preload the page button images
  buttonA_off = new Image();
  buttonA_off.src = "Images/Announcement_off.gif";
  buttonA_on = new Image();
  buttonA_on.src = "Images/Announcement_on.gif";

  buttonC_off = new Image();
  buttonC_off.src = "Images/Calendar_off.gif";
  buttonC_on = new Image();
  buttonC_on.src = "Images/Calendar_on.gif";

  buttonH_off = new Image();
  buttonH_off.src = "Images/Home_off.gif";
  buttonH_on = new Image();
  buttonH_on.src = "Images/Home_on.gif";

  buttonO_off = new Image();
  buttonO_off.src = "Images/Officers_off.gif";
  buttonO_on = new Image();
  buttonO_on.src = "Images/Officers_on.gif";

  buttonL_off = new Image();
  buttonL_off.src = "Images/Links_off.gif";
  buttonL_on = new Image();
  buttonL_on.src = "Images/Links_on.gif";

  // preload the calendar button images
  button1_off = new Image();
  button1_off.src = "Images/January_off.gif";
  button1_on = new Image();
  button1_on.src = "Images/January_on.gif";

  button2_off = new Image();
  button2_off.src = "Images/February_off.gif";
  button2_on = new Image();
  button2_on.src = "Images/February_on.gif";

  button3_off = new Image();
  button3_off.src = "Images/March_off.gif";
  button3_on = new Image();
  button3_on.src = "Images/March_on.gif";

  button4_off = new Image();
  button4_off.src = "Images/April_off.gif";
  button4_on = new Image();
  button4_on.src = "Images/April_on.gif";

  button5_off = new Image();
  button5_off.src = "Images/May_off.gif";
  button5_on = new Image();
  button5_on.src = "Images/May_on.gif";

  button6_off = new Image();
  button6_off.src = "Images/June_off.gif";
  button6_on = new Image();
  button6_on.src = "Images/June_on.gif";

  button7_off = new Image();
  button7_off.src = "Images/July_off.gif";
  button7_on = new Image();
  button7_on.src = "Images/July_on.gif";

  button8_off = new Image();
  button8_off.src = "Images/August_off.gif";
  button8_on = new Image();
  button8_on.src = "Images/August_on.gif";

  button9_off = new Image();
  button9_off.src = "Images/September_off.gif";
  button9_on = new Image();
  button9_on.src = "Images/September_on.gif";

  button10_off = new Image();
  button10_off.src = "Images/October_off.gif";
  button10_on = new Image();
  button10_on.src = "Images/October_on.gif";

  button11_off = new Image();
  button11_off.src = "Images/November_off.gif";
  button11_on = new Image();
  button11_on.src = "Images/November_on.gif";

  button12_off = new Image();
  button12_off.src = "Images/December_off.gif";
  button12_on = new Image();
  button12_on.src = "Images/December_on.gif";
}