// JavaScript Document
function authentification() 
{
	if(document.form_log.login_log.value=="")
	{
		alert("Login obligatoire.");
	}
	else
	{
		if(document.form_log.mdp_log.value=="")
		{
			alert("Mot de passe obligatoire.");
		}
		else
		{
			window.document.form_log.action = "valid_log.php";
			window.document.form_log.submit();
		}
	}
}