Uncaught TypeError: this.is is not a function : <p>I am getting error on <code>this.is</code>. is there any alternatives?</p>

<pre><code> function UpdateTotalPrice() {
    $('input[type=checkbox]').each(function () {
        var id = this.id;
        if (id.indexOf("chkSelected") &gt; -1) {
            if (this.checked &amp;&amp; this.is(':disabled')==false) {
              //  alert(id);
                getPrice(this);
            }

        }
    });

}
</code></pre>
