var testVer = 0;
    browser_name = navigator.appName;
    browser_version = parseFloat(navigator.appVersion);
    if (browser_name == "Netscape" && browser_version >= 3.0) {
      testVer=1;
    } else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 4.0) {
      testVer=1;
    }
    if (testVer == 1) {
	  anormal = new Image;
      anormal.src = "images/menu/company1.gif";
      alight = new Image;
      alight.src = "images/menu/company-on.gif";
      bnormal = new Image;
      bnormal.src = "images/menu/services.gif";
      blight = new Image;
      blight.src = "images/menu/services-on.gif";
      cnormal = new Image;
      cnormal.src = "images/menu/search.gif";
      clight = new Image;
      clight.src = "images/menu/search-on.gif";
	  dnormal = new Image;
      dnormal.src = "images/menu/contact.gif";
      dlight = new Image;
      dlight.src = "images/menu/contact-on.gif";
	  enormal = new Image;
    }
    function doChange( imgName ) {
      if(testVer == 1) {
        document.images[imgName].src = eval(imgName + "light.src");
      }
    }
    function undoChange( imgName ) {
      if(testVer == 1) {
        document.images[imgName].src = eval(imgName + "normal.src");
      }
    }