//rollovers
if (document.images) {
img1on = new Image();           // Inactive images
img1on.src = "images/home_on.gif";  
img2on = new Image(); 
img2on.src = "images/aboutus_on.gif";  
img3on = new Image();
img3on.src = "images/sales_on.gif";
img4on = new Image();
img4on.src = "images/sign_on.gif";
img5on = new Image();
img5on.src = "images/contactus_on.gif";


img1off = new Image();          // Active images
img1off.src = "images/home_off.gif"; 
img2off = new Image();
img2off.src = "images/aboutus_off.gif";  
img3off = new Image();
img3off.src = "images/sales_off.gif";
img4off = new Image();
img4off.src = "images/sign_off.gif";
img5off = new Image();
img5off.src = "images/contactus_off.gif";

}

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

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