if (document.images) {            // Active Images
            img1on = new Image();      
            img1on.src = "images/bmenu_kort_n.gif";
            img2on = new Image();      
            img2on.src = "images/bmenu_krachtig_n.gif";
            img3on = new Image();      
            img3on.src = "images/bmenu_wat_n.gif";
            img4on = new Image();      
            img4on.src = "images/bmenu_contact_n.gif";

			
            img1off = new Image(); 
            img1off.src = "images/bmenu_kort_o.gif";
            img2off = new Image(); 
            img2off.src = "images/bmenu_krachtig_o.gif";
            img3off = new Image(); 
            img3off.src = "images/bmenu_wat_o.gif";
            img4off = new Image(); 
            img4off.src = "images/bmenu_contact_o.gif";

        }

// 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");
        }
}