function VerificationEmail(elm)
{
if (elm.value.indexOf("@") != "-1" &&
    elm.value.indexOf(".") != "-1" &&
    elm.value != "")
    return true;

return false;
}

function VerificationFormulaire()
{
if ((document.drops.name.value=="") || (VerificationEmail(document.drops.email) == false && (document.drops.phone.value=="")))
    {
    alert("Vérifiez les zones Nom, EMail, Téléphone. Merci.");
    document.drops.name.focus();
    return false;
    }

return true;
}