if (document.images) { 
            agon = new Image();       
            agon.src = "http://www.agnum.lt/-/agnum_.gif";  
            agoff = new Image();  
            agoff.src = "http://www.agnum.lt/-/agnum.gif"; 
            elon = new Image();       
            elon.src = "http://www.agnum.lt/-/elit_.gif";  
            eloff = new Image();  
            eloff.src = "http://www.agnum.lt/-/elit.gif"; 
            } 
// function to change images to rollover state 
function rollon(imgName) { 
        if (document.images) { 
            document[imgName].src = eval(imgName + "on.src"); 
        } 
} 
// function to change images to non-rollover state 
function rolloff(imgName) { 
        if (document.images) { 
            document[imgName].src = eval(imgName + "off.src"); 
        } 
}