if (document.images) {            // Active Images
            img1on = new Image();      
            img1on.src = "../images/nav_company_on.gif";
            img1off = new Image(); 
            img1off.src = "../images/nav_company.gif";  
			
			img2on = new Image();      
            img2on.src = "../images/nav_services_on.gif";
            img2off = new Image(); 
            img2off.src = "../images/nav_services.gif"; 
			
			img3on = new Image();      
            img3on.src = "../images/nav_faq_on.gif";
            img3off = new Image(); 
            img3off.src = "../images/nav_faq.gif"; 
            
            img4on = new Image();      
            img4on.src = "../images/nav_resources_on.gif";
            img4off = new Image(); 
            img4off.src = "../images/nav_resources.gif"; 
            
            img5on = new Image();      
            img5on.src = "../images/nav_contact_on.gif";
            img5off = new Image(); 
            img5off.src = "../images/nav_contact.gif"; 
           
      }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}