Use CSS to automatically add ‘required field’ asterisk to form inputs

Is that what you had in mind?

http://jsfiddle.net/erqrN/1/

<label class="required">Name:</label>
<input type="text">

<style>
  .required:after {
    content:" *";
    color: red;
  }
</style>

.required:after {
  content:" *";
  color: red;
}
<label class="required">Name:</label>
<input type="text">

See https://developer.mozilla.org/en-US/docs/Web/CSS/pseudo-elements

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