if (typeof newsletter_check !== "function") { window.newsletter_check = function (f) { var re = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-]{1,})+\.)+([a-zA-Z0-9]{2,})+$/; if (!re.test(f.elements["email"].value)) { alert("The email is not correct"); return false; } if (f.elements["name"] && (f.elements["name"].value == "" || f.elements["name"].value == f.elements["name"].defaultValue)) { alert("The name is not correct"); return false; } if (f.elements["checkbox"] && !f.elements["checkbox"].checked) { alert("You must accept the privacy statement"); return false; } return true; } }