if(document.images)
{
emailOn=new Image(40,40);
emailOn.src="../img/email_aperta.gif";
emailOff=new Image(40,40);
emailOff.src="../img/email_chiusa.gif";

function attiva(pic)
{
if(document.images)
document.images[pic].src=eval(pic+"On.src");
}

function disattiva(pic)
{
if(document.images)
document.images[pic].src=eval(pic+"Off.src");
}
}