if (document.images) {
img1on = new Image();           
img1on.src = "images/company_on_gr.gif";
img2on = new Image();           
img2on.src = "images/products_on_gr.gif";
img3on = new Image();           
img3on.src = "images/brochure_on_gr.gif";
img4on = new Image();           
img4on.src = "images/contact_on_gr.gif";
img5on = new Image();           
img5on.src = "../images/company_on_en.gif";
img6on = new Image();           
img6on.src = "../images/products_on_en.gif";
img7on = new Image();           
img7on.src = "../images/brochure_on_en.gif";
img8on = new Image();           
img8on.src = "../images/contact_on_en.gif";

img1off = new Image();           
img1off.src = "images/company_off_gr.gif";
img2off = new Image();           
img2off.src = "images/products_off_gr.gif";
img3off = new Image();           
img3off.src = "images/brochure_off_gr.gif";
img4off = new Image();           
img4off.src = "images/contact_off_gr.gif";
img5off = new Image();           
img5off.src = "../images/company_off_en.gif";
img6off = new Image();           
img6off.src = "../images/products_off_en.gif";
img7off = new Image();           
img7off.src = "../images/brochure_off_en.gif";
img8off = new Image();           
img8off.src = "../images/contact_off_en.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");
        }
}