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/universal/header_menu-home1.gif";
      alight = new Image;
      alight.src = "images/universal/header_menu-home2.gif";
      bnormal = new Image;
      bnormal.src = "images/universal/header_menu-landscaping1.gif";
      blight = new Image;
      blight.src = "images/universal/header_menu-landscaping2.gif";
      cnormal = new Image;
      cnormal.src = "images/universal/header_menu-airomulch1.gif";
      clight = new Image;
      clight.src = "images/universal/header_menu-airomulch2.gif";
	  dnormal = new Image;
      dnormal.src = "images/universal/header_menu-erosion1.gif";
      dlight = new Image;
      dlight.src = "images/universal/header_menu-erosion2.gif";
	  enormal = new Image;
      enormal.src = "images/universal/header_menu-groundskeeping1.gif";
      elight = new Image;
      elight.src = "images/universal/header_menu-groundskeeping2.gif";
	  fnormal = new Image;
      fnormal.src = "images/universal/header_menu-portfolio1.gif";
      flight = new Image;
      flight.src = "images/universal/header_menu-portfolio2.gif";
	  gnormal = new Image;
      gnormal.src = "images/universal/header_menu-contact1.gif";
      glight = new Image;
      glight.src = "images/universal/header_menu-contact2.gif";
}
    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");
      }
    }