if (document.images) {            // Active Images
            img1on = new Image();
            img1on.src = "/images/link_aboutbluerill2.png";
            img2on = new Image();
            img2on.src = "/images/link_programs2.png";
            img3on = new Image();
            img3on.src = "/images/link_activities2.png";
            img4on = new Image();
            img4on.src = "/images/link_generalinfo2.png";
            img5on = new Image();
            img5on.src = "/images/link_joinourteam2.png";
            img6on = new Image();
            img6on.src = "/images/link_contactus2.png";

            img1off = new Image();
            img1off.src = "/images/link_aboutbluerill1.png";
            img2off = new Image();
            img2off.src = "/images/link_programs1.png";
            img3off = new Image();
            img3off.src = "/images/link_activities1.png";
            img4off = new Image();
            img4off.src = "/images/link_generalinfo1.png";
            img5off = new Image();
            img5off.src = "/images/link_joinourteam1.png";
            img6off = new Image();
            img6off.src = "/images/link_contactus1.png";

        }

// 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");
        }
}