title elementhead element containing no other title elements.interface HTMLTitleElement : HTMLElement {
           attribute DOMString text;
};
   The title element represents the
  document's title or name. Authors should use titles that identify
  their documents even when they are used out of context, for example
  in a user's history or bookmarks, or in search results. The
  document's title is often different from its first heading, since the
  first heading does not have to stand alone when taken out of
  context.
There must be no more than one title element per
  document.
text [ = value ]Returns the contents of the element, ignoring child nodes that
    aren't Text nodes.
Can be set, to replace the element's children with the given value.
The IDL attribute text must return a
  concatenation of the contents of all the Text nodes
  that are children of the title element (ignoring any
  other nodes such as comments or elements), in tree order. On
  setting, it must act the same way as the textContent
  IDL attribute.
Here are some examples of appropriate titles, contrasted with the top-level headings that might be used on those same pages.
  <title>Introduction to The Mating Rituals of Bees</title>
    ...
  <h1>Introduction</h1>
  <p>This companion guide to the highly successful
  <cite>Introduction to Medieval Bee-Keeping</cite> book is...
   The next page might be a part of the same site. Note how the title describes the subject matter unambiguously, while the first heading assumes the reader knows what the context is and therefore won't wonder if the dances are Salsa or Waltz:
  <title>Dances used during bee mating rituals</title>
    ...
  <h1>The Dances</h1>
  The string to use as the document's title is given by the document.title IDL attribute.
User agents should use the document's title when referring to the
  document in their user interface. When the contents of a
  title element are used in this way, the
  directionality of that title element should be
  used to set the directionality of the document's title in the user
  interface.