	JAVASCRIPT

JAVASCRIPT

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JAVASCRIPT ONCHANGE EVENT

The javascript onchange event handler is used to trigger a script or action when a user makes a content change to either <input>, <textarea> or <select> element.

Example:

<form action="#" method="post">
<select onchange="alert('You have made a change');">
<option select="selected">One</option>
<option >Two</option>
<option >Three</option>
</select>
</form>

The above example will output You have made a change when you select a new option.

The onchange event can also call a function as follows:

<head>

<script type="text/javascript">

function changeme ()
{
alert('You have made a change');
}

</script>

</head>

<body>

<form action="#" method="post">
<select onchange="changeme ();">
<option select="selected">One</option>
<option >Two</option>
<option >Three</option>
</select>
</form>

DEMO:

Change the select option below to see the effect.

See also: