function change_pwd()
{
	if (!document.getElementById('ck_passwd_change').checked)
	{
		document.getElementById('pwd_ancien_passwd').disabled = true;
		document.getElementById('pwd_nouveau_passwd').disabled = true;
		document.getElementById('pwd_nouveau_passwd_confirm').disabled = true;
	}
	else
	{
		document.getElementById('pwd_ancien_passwd').disabled = false;
		document.getElementById('pwd_nouveau_passwd').disabled = false;
		document.getElementById('pwd_nouveau_passwd_confirm').disabled = false;
	}
}