JavaScript Reference/Javascript Properties/id

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"id" Example

    
<html>
<body>
<script language="JavaScript">
function getID(elem) {
   var id = elem.id;
   alert("This element"s id attribute is set to \"" + id + "\"."); 
} 
</script>
<p>Click in the following image to display the id.</p>
<img id="myImg" src="yourimage.jpg" onclick="getID(this);">
</body>
</html>



"id" is applied to

+----------------+--------------------------------------------------------------+
| Applied_To     |<a>                             <acronym>                     |
|                |<address>                       <applet>                      |
|                |<area>                          <b>                           |
|                |<base>                          <basefont>                    |
|                |<bdo>                           <bgsound>                     |
|                |<big>                           <blockquote>                  |
|                |<body>                          <br>                          |
|                |<button>                        <caption>                     |
|                |<center>                        <cite>                        |
|                |<code>                          <col>                         |
|                |<colgroup>                      <comment>                     |
|                |<custom>                        <dd>                          |
|                |<del>                           <dfn>                         |
|                |<dir>                           <div>                         |
|                |<dl>                            <dt>                          |
|                |<em>                            <embed>                       |
|                |<fieldset>                      <font>                        |
|                |<form>                          <frame>                       |
|                |<frameset>                      <head>                        |
|                |<hn>                            <hr>                          |
|                |<html>                          <i>                           |
|                |<iframe>                        <img>                         |
|                |<input type="button">           <input type="checkbox">       |
|                |<input type="file">             <input type="hidden">         |
|                |<input type="image">            <input type="password">       |
|                |<input type="radio">            <input type="reset">          |
|                |<input type="submit">           <input type="text">           |
|                |<ins>                           <isindex>                     |
|                |<kbd>                           <label>                       |
|                |<legend>                        <li>                          |
|                |<link>                          <listing>                     |
|                |<map>                           <marquee>                     |
|                |<menu>                          <nobr>                        |
|                |<noframes>                      <noscript>                    |
|                |<object>                        <ol>                          |
|                |<optgroup>                      <option>                      |
|                |<p>                             <param>                       |
|                |<plaintext>                     <pre>                         |
|                |<q>                             <rt>                          |
|                |<ruby>                          <s>                           |
|                |<samp>                          <script>                      |
|                |<select>                        <small>                       |
|                |<span>                          <strike>                      |
|                |<strong>                        <style>                       |
|                |styleSheet                      <sub>                         |
|                |<sup>                           <table>                       |
|                |<tbody>                         <td>                          |
|                |<textarea>                      <tfoot>                       |
|                |<th>                            <thead>                       |
|                |<title>                         <tr>                          |
|                |<tt>                            <u>                           |
|                |<ul>                            <var>                         |
|                |<wbr>                           <xml>                         |
|                |<xmp>                                                         |
+----------------+--------------------------------------------------------------+



"id" Syntax and Note

Note:
Read and write property. 
Specifies the element identifier.
    
Syntax:
    
document.getElementById("elementID").id = value
document.all.elementID.id = value // IE only