[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] elements, nesting  [See nesting] elevation property  <em> tags  2nd  email, mailto URL for  2nd      defining mail header fields      sending form data via  <embed> tags      for audio  embedded guides  embedded links  [See hyperlinks] embedded objects  2nd      <applet> tags      <embed> tags      <noembed> tags      <object> tags      <param> tags  embedded tags  [See also HTML tags]2nd  emphasis, tags for     <b>      <blink>      <dfn>      <em>      <i>      <strong>  empty elements in XHTML documents  empty-cells property  encoding  [See also content types]     characters  [See special characters]     file-selection controls and  enctype attribute     <form>      <input type=file>  ending tags  2nd  3rd      omitting in HTML      XHTML vs. HTML documents  entities  2nd  3rd  4th      JavaScript      URL encodings  entity and element declarations (XML)  [See DTD for XML] equals sign (=) for tag attributes  escape entities, CSS2 standard  event attributes     <area> (client-side image maps)      <form>      <input type=button> (push buttons)      <map>      <ul>      <a>      <address>      <blockquote>      <center>      content-based tags      <div>      form controls      frames and      <h#>      <img>      objects and      <p>      physical style tags      <pre>      <q>      table tags  event handlers, JavaScript  2nd  [See also event attributes] executable content      applets      JavaScript  [See JavaScript language]     JavaScript style sheets  explicit label associations (forms)  Extended Font Model  Extensible Markup Language  [See XML] extensions, HTML  external style sheets  2nd      advantages and disadvantages of using