if (document.images) {           
 	    img0on = new Image();      
            img0on.src = "/01-dark.jpg";
            img1on = new Image();      
            img1on.src = "/02-dark.jpg";
 	    img2on = new Image();      
            img2on.src = "/03-dark.jpg";
            img3on = new Image();      
            img3on.src = "/04-dark.jpg";
 	    img4on = new Image();      
            img4on.src = "/05-dark.jpg";
            img5on = new Image();      
            img5on.src = "/06-dark.jpg";
	    img6on = new Image();
	    img6on.src = "/07-dark.jpg";

            img0off = new Image(); 
            img0off.src = "/01-light.jpg";
            img1off = new Image(); 
            img1off.src = "/02-light.jpg";
            img2off = new Image(); 
            img2off.src = "/03-light.jpg";
            img3off = new Image(); 
            img3off.src = "/04-light.jpg";
            img4off = new Image(); 
            img4off.src = "/05-light.jpg";
            img5off = new Image(); 
            img5off.src = "/06-light.jpg";
	    img6off = new Image(); 
            img6off.src = "/07-light.jpg";
}

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");
        }
}