if (document.images) {   
               homeon = new Image;
               homeon.src = "images/nav/home_on.gif"; 
               
               faqson = new Image;
               faqson.src = "images/nav/faqs_on.gif";  
               commlinkson = new Image;
               commlinkson.src = "images/nav/commlinks_on.gif";
               sitemapon = new Image;
               sitemapon.src = "images/nav/sitemap_on.gif";
               contactuson = new Image;
               contactuson.src = "images/nav/contactus_on.gif";                             
                              
               homeoff = new Image;
               homeoff.src = "images/nav/home_off.gif";  
               
               faqsoff = new Image;
               faqsoff.src = "images/nav/faqs_off.gif";  
               commlinksoff = new Image;
               commlinksoff.src = "images/nav/commlinks_off.gif";
               sitemapoff = new Image;
               sitemapoff.src = "images/nav/sitemap_off.gif";
               contactusoff = new Image;
               contactusoff.src = "images/nav/contactus_off.gif";          

}

function img_act(imgName) {
if (document.images) {
imgOn = eval(imgName + "on.src");
document [imgName].src = imgOn;
}
}
function img_inact(imgName) {
if (document.images) {
imgOff = eval(imgName + "off.src");
document [imgName].src = imgOff;
}
}