function VIRGDON() {
let chaine_don = document.getElementById('sivirg').value;
chaine_don = chaine_don.replace(",", ".");
document.getElementById('sivirg').value = chaine_don;
}
document.addEventListener("DOMContentLoaded", function() {
document.getElementById("don_paypal").innerHTML = '<form action="https://www.paypal.com/donate" method="post" target="_blank">Faire un don : <input type="hidden" name="business" value="don@marsanaryas.com"><input type="hidden" name="currency_code" value="EUR"><input type="text" name="amount" maxlength="8" value="5" class="champ_don" required id="sivirg" onchange="VIRGDON()"> € &nbsp;<input type="submit" value="OK" title="OK" class="bouton"></form>';
});