function OnMouseOverTasto(el, ancor) {
 el.style.background='#6699CC'; 
 el.style.color='#FFFFFF'; 
 ancor.style.color='#FFFFFF';
}

function OnMouseOutTasto(el, ancor) {
 el.style.background='#FFFFFF'; 
 el.style.color='#000000'; 
 ancor.style.color='#000000';
}