if (document.images) {
  	
  		
		companyOn = new Image();
  		companyOn.src ="img/button/about-over.gif";
		companyOff = new Image();
  		companyOff.src =  "img/button/about.gif";
		manageOn = new Image();
  		manageOn.src ="img/button/manage-over.gif";
		manageOff = new Image();
  		manageOff.src =  "img/button/manage.gif";
  		securityOn = new Image();
  		securityOn.src = "img/button/security-over.gif";
		securityOff = new Image();
  		securityOff.src = "img/button/security.gif";
  		productOn = new Image();
  		productOn.src = "img/button/validation-over.gif";
		productOff = new Image();
  		productOff.src = "img/button/validation.gif";
                digicertOn = new Image();
  		digicertOn.src = "img/button/digicert-over.gif";
		digicertOff = new Image();
  		digicertOff.src = "img/button/digicert.gif";
		unixOn = new Image();
  		unixOn.src = "img/button/unix-over.gif";
		unixOff = new Image();
  		unixOff.src = "img/button/unix.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");
    			}
                }
        }