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onblur Event

Event Object Reference Complete Event Object Reference

Definition and Usage

The onblur event occurs when an object loses focus.

Syntax

onblur="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, submit, text, textarea, window

Example

In this example we will execute some JavaScript code when a user leaves an input field:

<html>
<head>
<script type="text/javascript">
function upperCase()
{
var x=document.getElementById("fname").value
document.getElementById("fname").value=x.toUpperCase()
}
</script>
</head>
<body>
Enter your name:
<input type="text" id="fname" onblur="upperCase()">
</body>
</html>

The output of the code above will be:

Enter your name:

Try-It-Yourself Demos

onblur
How to use the onblur event to execute some JavaScript code when a user leaves an input field.

Event Object Reference Complete Event Object Reference

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