if (document.images) {            // Active Images
            img1on = new Image();      
            img1on.src = "imagenes/LOGO_hellocanvas.png"; 
            img2on = new Image();      
            img2on.src = "imagenes/LOGO_lolacamisetas.png"; 
            img3on = new Image();      
            img3on.src = "imagenes/LOGO_poken.png"; 
            img4on = new Image();      
            img4on.src = "imagenes/LOGO_evadium.png"; 
            img5on = new Image();      
            img5on.src = "imagenes/LOGO_chupachups.png"; 
            img6on = new Image();      
            img6on.src = "imagenes/LOGO_cccb.png"; 
            img7on = new Image();      
            img7on.src = "imagenes/LOGO_vitalinnova.png"; 
            img8on = new Image();      
            img8on.src = "imagenes/LOGO_triopic.png"; 
            img9on = new Image();      
            img9on.src = "imagenes/LOGO_animac.png"; 
            img10on = new Image();      
            img10on.src = "imagenes/LOGO_photolocus.png"; 
            img16on = new Image();      
            img16on.src = "imagenes/LOGO_digitaltoyshop.png"; 

            img11on = new Image();      
            img11on.src = "imagenes/ICONO_twitter.png"; 
            img12on = new Image();      
            img12on.src = "imagenes/ICONO_facebook.png"; 
            img13on = new Image();      
            img13on.src = "imagenes/ICONO_blogs.png"; 
            img14on = new Image();      
            img14on.src = "imagenes/ICONO_fotodonantes.png"; 
            img15on = new Image();      
            img15on.src = "imagenes/ICONO_pdf.png"; 
            
            img20on = new Image();      
            img20on.src = "imagenes/menu_00.png"; 
            img21on = new Image();      
            img21on.src = "imagenes/menu_01.png"; 
            img22on = new Image();      
            img22on.src = "imagenes/menu_02.png"; 
            img23on = new Image();      
            img23on.src = "imagenes/menu_03.png"; 
            img24on = new Image();      
            img24on.src = "imagenes/menu_04.png"; 
            img25on = new Image();      
            img25on.src = "imagenes/menu_05.png"; 
            img26on = new Image();      
            img26on.src = "imagenes/menu_06.png"; 
                                           
            img1off = new Image();      
            img1off.src = "imagenes/LOGO_hellocanvas_off.png"; 
            img2off = new Image();      
            img2off.src = "imagenes/LOGO_lolacamisetas_off.png"; 
            img3off = new Image();      
            img3off.src = "imagenes/LOGO_poken_off.png"; 
            img4off = new Image();      
            img4off.src = "imagenes/LOGO_evadium_off.png"; 
            img5off = new Image();      
            img5off.src = "imagenes/LOGO_chupachups_off.png"; 
            img6off = new Image();      
            img6off.src = "imagenes/LOGO_cccb_off.png"; 
            img7off = new Image();      
            img7off.src = "imagenes/LOGO_vitalinnova_off.png"; 
            img8off = new Image();      
            img8off.src = "imagenes/LOGO_triopic_off.png"; 
            img9off = new Image();      
            img9off.src = "imagenes/LOGO_animac_off.png"; 
            img10off = new Image();      
            img10off.src = "imagenes/LOGO_photolocus_off.png"; 
            img16off = new Image();      
            img16off.src = "imagenes/LOGO_digitaltoyshop_off.png"; 

            img11off = new Image();      
            img11off.src = "imagenes/ICONO_twitter_off.png"; 
            img12off = new Image();      
            img12off.src = "imagenes/ICONO_facebook_off.png"; 
            img13off = new Image();      
            img13off.src = "imagenes/ICONO_blogs_off.png"; 
            img14off = new Image();      
            img14off.src = "imagenes/ICONO_fotodonantes_off.png"; 
            img15off = new Image();      
            img15off.src = "imagenes/ICONO_pdf_off.png"; 
            
            img20off = new Image();      
            img20off.src = "imagenes/menu_00_off.png"; 
            img21off = new Image();      
            img21off.src = "imagenes/menu_01_off.png"; 
            img22off = new Image();      
            img22off.src = "imagenes/menu_02_off.png"; 
            img23off = new Image();      
            img23off.src = "imagenes/menu_03_off.png"; 
            img24off = new Image();      
            img24off.src = "imagenes/menu_04_off.png"; 
            img25off = new Image();      
            img25off.src = "imagenes/menu_05_off.png"; 
            img26off = new Image();      
            img26off.src = "imagenes/menu_06_off.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");
        }
}