function checkdata() {
  var re_email = /^([_a-zA-Z0-9-]+)(.[_a-zA-Z0-9-]+)*@([a-zA-Z0-9-]+.)+([a-zA-Z]{2,3})$/;
  var email = document.we_global_form.we_subscribe_email__.value;
  if ((re_email.test(email))==false || email.length==0) {
  	alert("Ihre E-Mail-Adresse ist ungültig!");
    return false;
  }
  else { return true; }
}