JavaScript Reference/Javascript Methods/getElementsByTagName

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"getElementsByTagName()" Example

    
<html>
<body>
<script language="JavaScript">
function function1() {
    var m = document.getElementsByTagName("P");
    alert(m.length); 
} 
</script>
<input type="button" 
       value="Get the number of p elements in this page" 
       onClick="function1();">
</body>
</html>



"getElementsByTagName()" 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>                      <custom>                      |
|                |<dd>                            <del>                         |
|                |<dfn>                           <dir>                         |
|                |<div>                           <dl>                          |
|                |document                        <dt>                          |
|                |<em>                            <embed>                       |
|                |<fieldset>                      <font>                        |
|                |<form>                          <frame>                       |
|                |<frameset>                      <head>                        |
|                |<hn>                            <hr>                          |
|                |<html>                          <i>                           |
|                |<iframe>                        <img>                         |
|                |<ins>                           <isindex>                     |
|                |<kbd>                           <label>                       |
|                |<legend>                        <li>                          |
|                |<link>                          <listing>                     |
|                |<map>                           <marquee>                     |
|                |<menu>                          <meta>                        |
|                |<noframes>                      <noscript>                    |
|                |<object>                        <ol>                          |
|                |<optgroup>                      <option>                      |
|                |<p>                             <param>                       |
|                |<plaintext>                     <pre>                         |
|                |<q>                             <s>                           |
|                |<samp>                          <script>                      |
|                |<select>                        <small>                       |
|                |<span>                          <strike>                      |
|                |<strong>                        <style>                       |
|                |<sub>                           <sup>                         |
|                |<table>                         <tbody>                       |
|                |<td>                            <textarea>                    |
|                |<tfoot>                         <th>                          |
|                |<thead>                         <title>                       |
|                |<tr>                            <tt>                          |
|                |<u>                             <ul>                          |
|                |<var>                           <xmp>                         |
+----------------+--------------------------------------------------------------+



"getElementsByTagName()" Syntax, Parameters and Note

Note:
Returns elements by tag name.
    
Syntax:
    
document.getElementsByTagName(param1)
document.all.elementID.getElementsByTagName(param1) // IE only
Parameters:
    param1   Required; the tag name.