function signupInit() {
  $("accept").checked = false;
  toggleSubmit();
}

function toggleSubmit() {
  if (submit_disabled == true) {
    submit_disabled = false;
    $("submit").disabled = false;
    $("submit").addClassName("enabled");
    $("submit").removeClassName("disabled");
  } else {
    submit_disabled = true;
    $("submit").disabled = true;
    $("submit").addClassName("disabled");
    $("submit").removeClassName("enabled");
  }
}

function populateSubdomain(subdomain) {
  $("subdomain").value = toUrl(subdomain);
}

function toUrl(subdomain) {
  subdomain = subdomain.toLowerCase();
  subdomain = subdomain.split(/[^\w\s\-]/g);
  subdomain = subdomain.join("");
  subdomain = subdomain.replace(/\s+/g, "");
  return subdomain;
}