if (document.images) {
        img1on = new Image();
        img1on.src = "images/about_on.gif";
        img1off = new Image();
        img1off.src = "images/about.gif"
                
        img2on = new Image();
        img2on.src = "images/services_on.gif";
        img2off = new Image();
        img2off.src = "images/services.gif"
                
        img3on = new Image();
        img3on.src = "images/experience_on.gif";
        img3off = new Image();
        img3off.src = "images/experience.gif"    

        img4on = new Image();
        img4on.src = "images/leadership_on.gif";
        img4off = new Image();
        img4off.src = "images/leadership.gif"   
		
		img5on = new Image();
        img5on.src = "images/contact_on.gif";
        img5off = new Image();
        img5off.src = "images/contact.gif"   
		
}
function imgSwap (imgName,imgFile)  { 
        if (document.images)  {
                document.images[imgName].src = eval (imgFile + ".src");
        }
}