<!--
if (document.images) {            // Active Images

            d1on = new Image();      
            d1on.src = "images_portfolio/d1_btn_on.gif";
            
            d2on = new Image();      
            d2on.src = "images_portfolio/d2_btn_on.gif";
            
            d3on = new Image();      
            d3on.src = "images_portfolio/d3_btn_on.gif";
            
            d4on = new Image();      
            d4on.src = "images_portfolio/d4_btn_on.gif";
            
            d5on = new Image();      
            d5on.src = "images_portfolio/d5_btn_on.gif";
            
            d6on = new Image();      
            d6on.src = "images_portfolio/d6_btn_on.gif";
            
            d7on = new Image();      
            d7on.src = "images_portfolio/d7_btn_on.gif";
            
            d8on = new Image();      
            d8on.src = "images_portfolio/d8_btn_on.gif";
            
            d9on = new Image();      
            d9on.src = "images_portfolio/d9_btn_on.gif";
            
            d10on = new Image();      
            d10on.src = "images_portfolio/d10_btn_on.gif";
            
          
            d1off = new Image();      
            d1off.src = "images_portfolio/d1_btn_off.gif";
            
            d2off = new Image();      
            d2off.src = "images_portfolio/d2_btn_off.gif";
            
            d3off = new Image();      
            d3off.src = "images_portfolio/d3_btn_off.gif";
            
            d4off = new Image();      
            d4off.src = "images_portfolio/d4_btn_off.gif";
            
            d5off = new Image();      
            d5off.src = "images_portfolio/d5_btn_off.gif";
            
            d6off = new Image();      
            d6off.src = "images_portfolio/d6_btn_off.gif";
            
            d7off = new Image();      
            d7off.src = "images_portfolio/d7_btn_off.gif";
            
            d8off = new Image();      
            d8off.src = "images_portfolio/d8_btn_off.gif";
            
            d9off = new Image();      
            d9off.src = "images_portfolio/d9_btn_off.gif";
            
            d10off = new Image();      
            d10off.src = "images_portfolio/d10_btn_off.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");
        }
}

// -->