|
JavaScript onfocus Event
 Complete Event Reference
Definition and Usage
The onfocus event occurs when an object gets focus.
Syntax
|
onfocus="SomeJavaScriptCode"
|
| Parameter |
Description |
| SomeJavaScriptCode |
Required. Specifies a JavaScript to be executed when the
event occurs. |
Supported by the following HTML tags:
<a>, <acronym>, <address>, <area>, <b>, <bdo>, <big>, <blockquote>,
<button>, <caption>, <cite>, <dd>, <del>, <dfn>, <div>, <dl>,
<dt>, <em>, <fieldset>, <form>, <frame>, <frameset>, <h1> to <h6>,
<hr>, <i>, <iframe>, <img>, <input>, <ins>, <kbd>, <label>,
<legend>, <li>, <object>, <ol>, <p>, <pre>, <q>, <samp>,
<select>, <small>, <span>, <strong>, <sub>, <sup>, <table>, <tbody>,
<td>, <textarea>, <tfoot>, <th>, <thead>, <tr>, <tt>, <ul>, <var>
|
Supported by the following JavaScript objects:
button, checkbox, fileUpload, layer, frame, password, radio, reset, select, submit,
text, textarea, window |
Example
In this example the background color of the input fields change when they get
focus:
<html>
<head>
<script type="text/javascript">
function setStyle(x)
{
document.getElementById(x).style.background="yellow";
}
</script>
</head>
<body>
First name: <input type="text"
onfocus="setStyle(this.id)" id="fname">
<br />
Last name: <input type="text"
onfocus="setStyle(this.id)" id="lname">
</body>
</html>
|
The output of the code above will be:
|
Complete Event Reference
 |
W3Schools' Online Certification Program
The perfect solution for professionals who need to balance work, family, and career building.
More than 3500 certificates already issued!
|
The HTML Certificate documents your knowledge of HTML, XHTML, and CSS.
The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.
The XML Certificate documents your knowledge of XML, XML DOM and XSLT.
The ASP Certificate documents your knowledge of ASP, SQL, and ADO.
The PHP Certificate documents your knowledge of PHP and SQL (MySQL).
|
