login =		document.getElementById('login_form_login');
password = 	document.getElementById('login_form_password');
email = 	document.getElementById('news_form_email');

function clear_log_form(){
	if(login.value == 'email'){
		login.value = '';
		password.value = '';
	}
}
function clear_news_form(){
	if(email.value == 'Saisir votre mail'){
		email.value = '';
	}
}