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JavaScript onKeyUp Event


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>
JavaScript onKeyUp Event Reviewed by 1000sourcecodes on 05:59 Rating: 5
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