if (document.images) {            // Active Images

//images while rolling over

            img1on = new Image();      
            img1on.src = "images/NewsButton_on.jpg";

            img2on = new Image();      
            img2on.src = "images/ArtistsButton_on.jpg";

	    img3on = new Image();      
            img3on.src = "images/MusicButton_on.jpg";

	    img4on = new Image();      
            img4on.src = "images/BuyButton_on.jpg";

	    img5on = new Image();      
            img5on.src = "images/ContactButton_on.jpg";

	    
//default images

            img1off = new Image(); 
            img1off.src = "images/NewsButton_off.jpg";

            img2off = new Image(); 
            img2off.src = "images/ArtistsButton_off.jpg";

            img3off = new Image(); 
            img3off.src = "images/MusicButton_off.jpg";

            img4off = new Image(); 
            img4off.src = "images/BuyButton_off.jpg";

            img5off = new Image(); 
            img5off.src = "images/ContactButton_off.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");
        }
}