if (document.images) {
    home_off = new Image(); home_off.src = "images/m-home.gif";
    news_off = new Image(); news_off.src = "images/m-news.gif";
    company_off = new Image(); company_off.src = "images/m-company.gif";
    products_off = new Image(); products_off.src = "images/m-glass-products.gif";
    gallery_off = new Image(); gallery_off.src = "images/m-gallery.gif";
    links_off = new Image(); links_off.src = "images/m-links.gif";
    contact_off = new Image(); contact_off.src = "images/m-contact-hartung-studio.gif";
    impressions_off = new Image(); impressions_off.src = "images/mp-impressions-glass.gif";
    impact_off = new Image(); impact_off.src = "images/mp-impact-decorative.gif";  
    totalvision_off = new Image(); totalvision_off.src = "images/mp-total-vision.gif";
    textures_off = new Image(); textures_off.src = "images/mp-textured-tinted-glass.gif";
    surestep_off = new Image(); surestep_off.src = "images/mp-surestep.gif";
    assistance_off = new Image(); assistance_off.src = "images/need-assistance.jpg";
    newsletter_off = new Image(); newsletter_off.src = "images/mp-newsletter-signup.gif";


     
    home_on = new Image(); home_on.src = "images/m-home-on.gif";
    news_on = new Image(); news_on.src = "images/m-news-on.gif";
    company_on = new Image(); company_on.src = "images/m-company-on.gif";
    products_on = new Image(); products_on.src = "images/m-glass-products-on.gif";
    gallery_on = new Image(); gallery_on.src = "images/m-gallery-on.gif";
    links_on = new Image(); links_on.src = "images/m-links-on.gif";
    contact_on = new Image(); contact_on.src = "images/m-contact-hartung-studio-on.gif";
    impressions_on = new Image(); impressions_on.src = "images/mp-impressions-glass-on.gif";
    impact_on = new Image(); impact_on.src = "images/mp-impact-decorative-on.gif";   
    totalvision_on = new Image(); totalvision_on.src = "images/mp-total-vision-on.gif";
    textures_on = new Image(); textures_on.src = "images/mp-textured-tinted-glass-on.gif";
    surestep_on = new Image(); surestep_on.src = "images/mp-surestep-on.gif";
    assistance_on = new Image(); assistance_on.src = "images/need-assistance-on.jpg";
    newsletter_on = new Image(); newsletter_on.src = "images/mp-newsletter-signup-on.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"); 
						      
				}
}