if (document.images) {    
        img1on = new Image();  
        img1on.src ="im-testo/home_down.gif";       // immagini attive   
        img2on = new Image();
        img2on.src ="im-testo/reg_down.gif"; 
        img3on = new Image();  
        img3on.src ="im-testo/classifica_down.gif";
        img4on = new Image();  
        img4on.src ="im-testo/ultime_down.gif"; 
        img5on = new Image();  
        img5on.src ="im-testo/chat_down.gif"; 
        img6on = new Image();  
        img6on.src ="im-testo/bacheca_down.gif"; 
        img7on = new Image();  
        img7on.src ="im-testo/gazzetta_down.gif"; 
        img8on = new Image();  
        img8on.src ="im-testo/albo_down.gif"; 

        img1off = new Image();    
        img1off.src ="im-testo/home_up.gif";       // immagini inattive
        img2off = new Image(); 
        img2off.src ="im-testo/reg_up.gif";   
        img3off = new Image();     
        img3off.src ="im-testo/classifica_up.gif";   
        img4off = new Image();     
        img4off.src ="im-testo/ultime_up.gif";        
        img5off = new Image();     
        img5off.src ="im-testo/chat_up.gif";        
        img6off = new Image();     
        img6off.src ="im-testo/bacheca_up.gif";        
        img7off = new Image();     
        img7off.src ="im-testo/gazzetta_up.gif";        
        img8off = new Image();     
        img8off.src ="im-testo/albo_up.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");      
      }
}
// -->