jquery.unwrap.js

/**
 * $.fn.unwrap
 * Unwraps an element (replaces an elements parent with the element)
 *
 * NO LONGER NECESSARY AS OF jQuery 1.4
 * 
 * Example:
 * $('#foo').unwrap();
 * Will replace:
 * <div><span id="foo">bar</span></div>
 * with:
 * <span id="foo">bar</span>
 */      
$.fn.unwrap = function() {
  return this.replaceWith(this.html());
};