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:
Try-It-Yourself Demos
onfocus
How to use onfocus.
Complete Event Reference
Whether you're new to XML or already an advanced user, the user-friendly views
and powerful entry helpers, wizards, and debuggers in XMLSpy are designed to
meet your XML and Web services development needs from start to finish.
- XML editor
- Graphical XML Schema / DTD editors
- XSLT 1.0/2.0 editor, debugger, profiler
- XQuery editor, debugger, profiler
- Support for Office Open XML (OOXML)
- Graphical WSDL editor & SOAP debugger
- Java, C#, C++ code generation
- And much more!
Download a free 30-day trial today!
Click to see a demo!
Learn what’s new in v2008
 |
|
Get Your Diploma!
W3Schools' Online Certification Program is the perfect solution for busy
professionals who need to balance work, family, and career building.
The HTML Certificate is for developers who want to document their knowledge of HTML, XHTML, and CSS.
The ASP Certificate is for developers who want to document their knowledge of ASP, SQL, and ADO.
|
|
HOME
Printer friendly page
