JavaScript onKeyUp Event
 Complete Event Reference
Definition and Usage
The onkeyup event occurs when a keyboard key is released.
Syntax
onkeyup="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>,
<body>, <button>, <caption>, <cite>, <code>, <dd>, <del>, <dfn>, <div>, <dt>, <em>, <fieldset>,
<form>, <h1> to <h6>, <hr>, <i>,
<input>, <kbd>, <label>, <legend>, <li>,
<map>, <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:
|
document, image, link, textarea |
Example
When typing letters in the input field in the following example, the letters
will change to uppercase (one by one):
<html>
<head>
<script type="text/javascript">
function upperCase(x)
{
var y=document.getElementById(x).value;
document.getElementById(x).value=y.toUpperCase();
}
</script>
</head>
<body>
Enter your name: <input type="text"
id="fname" onkeyup="upperCase(this.id)">
</body>
</html>
|
The output of the code above will be:
Try-It-Yourself Demos
onkeyup
How to use onkeyup.
Complete Event Reference
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