function activer() {
document.commentform.author.disabled=true;
document.commentform.email.disabled=true;
document.commentform.url.disabled=true;
document.commentform.author.value="";
document.commentform.email.value="";
document.commentform.url.value="";
}

function desactiver() {
document.commentform.author.disabled=false;
document.commentform.email.disabled=false;
document.commentform.url.disabled=false;
document.commentform.author.value="";
document.commentform.email.value="";
document.commentform.url.value="";
}