<!--
if (document.images) {            // Active Images

            b1on = new Image();      
            b1on.src = "images_portfolio/b1_btn_on.gif";
            
            b2on = new Image();      
            b2on.src = "images_portfolio/b2_btn_on.gif";
            
            b3on = new Image();      
            b3on.src = "images_portfolio/b3_btn_on.gif";
            
            b4on = new Image();      
            b4on.src = "images_portfolio/b4_btn_on.gif";
            
            b5on = new Image();      
            b5on.src = "images_portfolio/b5_btn_on.gif";
            
            b6on = new Image();      
            b6on.src = "images_portfolio/b6_btn_on.gif";
            
            b7on = new Image();      
            b7on.src = "images_portfolio/b7_btn_on.gif";
            
            b8on = new Image();      
            b8on.src = "images_portfolio/b8_btn_on.gif";
            
            b9on = new Image();      
            b9on.src = "images_portfolio/b9_btn_on.gif";
            
            b10on = new Image();      
            b10on.src = "images_portfolio/b10_btn_on.gif";
            
          
            b1off = new Image();      
            b1off.src = "images_portfolio/b1_btn_off.gif";
            
            b2off = new Image();      
            b2off.src = "images_portfolio/b2_btn_off.gif";
            
            b3off = new Image();      
            b3off.src = "images_portfolio/b3_btn_off.gif";
            
            b4off = new Image();      
            b4off.src = "images_portfolio/b4_btn_off.gif";
            
            b5off = new Image();      
            b5off.src = "images_portfolio/b5_btn_off.gif";
            
            b6off = new Image();      
            b6off.src = "images_portfolio/b6_btn_off.gif";
            
            b7off = new Image();      
            b7off.src = "images_portfolio/b7_btn_off.gif";
            
            b8off = new Image();      
            b8off.src = "images_portfolio/b8_btn_off.gif";
            
            b9off = new Image();      
            b9off.src = "images_portfolio/b9_btn_off.gif";
            
            b10off = new Image();      
            b10off.src = "images_portfolio/b10_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");
        }
}

// -->