Check multiple extension in javascript?
<p>Hello everyone how can I check my multiple file extions in input button with javascript like file must be mp3,mp4</p>

<pre><code>&lt;p&gt;&lt;input type="file" id="file" name="file" size="23"/&gt;&lt;/p&gt;&lt;br /&gt;
        &lt;p&gt;&lt;input type="submit" value="Upload file" /&gt;&lt;/p&gt; 
</code></pre>

<p>Javascript:</p>

<pre><code>$(function () {
    $('form').submit(function () {
        var selectedFile = $('#file').val();
        var matches = selectedFile.match(/\.(xlsx?)$/i);
        if (matches == null) {
            alert('please select an Excel file');
            return false;
        }
        return true;
    });
});
</code></pre>
