if (document.images) {
  image1on = new Image();
  image1on.src = "images/index_page/mc_index_nav1_over.gif";

  image2on = new Image();
  image2on.src = "images/index_page/mc_index_nav2_over.gif";

  image3on = new Image();
  image3on.src = "images/index_page/mc_index_nav3_over.gif";

  image4on = new Image();
  image4on.src = "images/index_page/mc_index_nav4_over.gif";

  image5on = new Image();
  image5on.src = "images/index_page/mc_index_nav5_over.gif";

  image1off = new Image();
  image1off.src = "images/index_page/mc_index_nav1_off.gif";

  image2off = new Image();
  image2off.src = "images/index_page/mc_index_nav2_off.gif";

  image3off = new Image();
  image3off.src = "images/index_page/mc_index_nav3_off.gif";

  image4off = new Image();
  image4off.src = "images/index_page/mc_index_nav4_off.gif";

  image5off = new Image();
  image5off.src = "images/index_page/mc_index_nav5_off.gif";
  
  subimage1on = new Image();
  subimage1on.src = "images/subpages/mc_nav1_over.gif";

  subimage2on = new Image();
  subimage2on.src = "images/subpages/mc_nav2_over.gif";

  subimage3on = new Image();
  subimage3on.src = "images/subpages/mc_nav3_over.gif";

  subimage4on = new Image();
  subimage4on.src = "images/subpages/mc_nav4_over.gif";

  subimage5on = new Image();
  subimage5on.src = "images/subpages/mc_nav5_over.gif";

  subimage1off = new Image();
  subimage1off.src = "images/subpages/mc_nav1_off.gif";

  subimage2off = new Image();
  subimage2off.src = "images/subpages/mc_nav2_off.gif";

  subimage3off = new Image();
  subimage3off.src = "images/subpages/mc_nav3_off.gif";

  subimage4off = new Image();
  subimage4off.src = "images/subpages/mc_nav4_off.gif";

  subimage5off = new Image();
  subimage5off.src = "images/subpages/mc_nav5_off.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}

 // open new window
function popUpWin(URL,name) {
 popupWin = window.open(URL, name, 'width=270,height=400,resizable=no,scrollbars=yes,top=20,left=20');
 if(window.focus) {  // only where supported
  popupWin.focus();
  }
 }