function newImage(arg) {
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

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

var preloadFlag = false;
function preloadImages() {
  if (document.images) {
    company_03_over     = newImage("/images/toolbar/company_03_over.gif");
    company_05_over     = newImage("/images/toolbar/company_05_over.gif");
    company_09_over     = newImage("/images/toolbar/company_09_over.gif");
    company_11_over     = newImage("/images/toolbar/company_11_over.gif");
    company_03_over007  = newImage("/images/toolbar/company_03_over-07.gif");
    company_03_over009  = newImage("/images/toolbar/company_03_over-09.gif");
    company_05_over011  = newImage("/images/toolbar/company_05_over-11.gif");
    company_05_over013  = newImage("/images/toolbar/company_05_over-13.gif");
    company_09_over017  = newImage("/images/toolbar/company_09_over-17.gif");
    company_09_over019  = newImage("/images/toolbar/company_09_over-19.gif");
    company_11_over021  = newImage("/images/toolbar/company_11_over-21.gif");
    company_11_over023  = newImage("/images/toolbar/company_11_over-23.gif");
    company_11_over025  = newImage("/images/toolbar/company_11_over-25.gif");
    company_03_over027  = newImage("/images/toolbar/company_03_over-27.gif");
    company_05_over029  = newImage("/images/toolbar/company_05_over-29.gif");
    company_09_over032  = newImage("/images/toolbar/company_09_over-32.gif");
    company_11_over034  = newImage("/images/toolbar/company_11_over-34.gif");
    preloadFlag = true;
  }
}