function OnMouseOverTasto(el, ancor) {
 el.style.background='#0097DA'; 
 el.style.color='#8B2121'; 
 ancor.style.color='#FFFFFF';
}

function OnMouseOutTasto(el, ancor) {
 el.style.background='#BFBFBF'; 
 el.style.color='#717171'; 
 ancor.style.color='#717171';
}