if (document.images) {            // Active Images
            img1on = new Image();
            img1on.src = "images/homepage/facialindex2.jpg";
            img2on = new Image();
            img2on.src = "images/homepage/laguardia2.jpg";
            img3on = new Image();
            img3on.src = "images/homepage/riverside2.jpg";
            img4on = new Image();
            img4on.src = "images/homepage/current2.jpg";
            img5on = new Image();
            img5on.src = "images/homepage/brochure2.jpg";
            img6on = new Image();
            img6on.src = "images/homepage/gvstudio2.jpg";
            img7on = new Image();
            img7on.src = "images/homepage/chelseatriplex2.jpg";
            img8on = new Image();
            img8on.src = "images/homepage/hanson2.jpg";
            img9on = new Image();
            img9on.src = "images/homepage/dcnyoffice2.jpg";
            img10on = new Image();
            img10on.src = "images/homepage/uppereast2.jpg";
            img11on = new Image();
            img11on.src = "images/homepage/gramercy2.jpg";
            img12on = new Image();
            img12on.src = "images/homepage/centralparkwest2.jpg";
            img13on = new Image();
            img13on.src = "images/homepage/chelsea2.jpg";
            img14on = new Image();
            img14on.src = "images/homepage/columbuscircle2.jpg";
            img15on = new Image();
            img15on.src = "images/homepage/fifthavenue2.jpg";

            img1off = new Image();
            img1off.src = "images/homepage/facialindex1.jpg";
            img2off = new Image();
            img2off.src = "images/homepage/laguardia1.jpg";
            img3off = new Image();
            img3off.src = "images/homepage/riverside1.jpg";
            img4off = new Image();
            img4off.src = "images/homepage/current1.jpg";
            img5off = new Image();
            img5off.src = "images/homepage/brochure1.jpg";
            img6off = new Image();
            img6off.src = "images/homepage/gvstudio1.jpg";
            img7off = new Image();
            img7off.src = "images/homepage/chelseatriplex1.jpg";
            img8off = new Image();
            img8off.src = "images/homepage/hanson1.jpg";
            img9off = new Image();
            img9off.src = "images/homepage/dcnyoffice1.jpg";
            img10off = new Image();
            img10off.src = "images/homepage/uppereast1.jpg";
            img11off = new Image();
            img11off.src = "images/homepage/gramercy1.jpg";
            img12off = new Image();
            img12off.src = "images/homepage/centralparkwest1.jpg";
            img13off = new Image();
            img13off.src = "images/homepage/chelsea1.jpg";
            img14off = new Image();
            img14off.src = "images/homepage/columbuscircle1.jpg";
            img15off = new Image();
            img15off.src = "images/homepage/fifthavenue1.jpg";

        }

// 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");
        }
}