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JavaScript onblur Event
 Complete Event Reference
Definition and Usage
The onblur event occurs when an object loses focus.
Syntax
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onblur="SomeJavaScriptCode"
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| 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>
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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>
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The output of the code above will be:
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Complete Event Reference
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