namespacing-bad-form-example.js

var element = $("div.form-errors");

if (formHasErrors()) {
  element.show();
}

// More, unrelated code...

var element = $("form#login");
element.addClass("has-errors");

// Another block of code...

$("input.submit").on("click", function() {
  element.remove();
  // ...
});