Auto-Focus Form Elements with JavaScript

After digging through the WordPress source code, I stumbled upon this very useful JavaScript method for auto-focusing form elements upon page load. Here is the JavaScript code (place within the document head):

<script type="text/javascript">
   function formfocus() {
      document.getElementById('element').focus();
   }
   window.onload = formfocus;
</script>

…and corresponding (X)HTML markup (abbreviated for clarity):

<form>
   <input id="element" />
   <input />
   <input />
</form>

In this example, the first form element (identified by id="element") will be automatically focused when the document loads, thus facilitating the process of entering data in the form. This technique would serve users well on login pages (wink, wink;), or anywhere forms are required on a repetitive basis.

Update: [ May 29th, 2007 ] - Here is a similar method of auto-focusing a form element with just a splash of JavaScript. Place the following code into an input element that contains a predefined field value and watch in amazement as the text string is automatically highlighted upon user focus. Here is the JavaScript snippet:

onfocus="this.select();"

..and here is a “live” example:

..and corresponding code:

<form action="http://domain.com/" method="post">
   <div>
      <input onfocus="this.select();" value="Select this input element and this text will be highlighted.." size="55" type="text">
   </div>
</form>