function OnMouseOverTasto(el, ancor) {
 el.style.background='#FFFEAA'; 
 el.style.color='#006534'; 
 ancor.style.color='#006534';
}

function OnMouseOutTasto(el, ancor) {
 el.style.background='#DEF0A3'; 
 el.style.color='#31619C'; 
 ancor.style.color='#30619E';
}