Maxlength check using JQuery For multiline text box
<pre><code>&lt;asp:TextBox ID="txtPurpose" CssClass="dd" runat="server" MaxLength="500" OnKeyUp="return maxlength();" OnPaste="return maxlength();" TextMode="MultiLine"
                                Width="70%" Rows="4" ValidationGroup="tool"&gt;&lt;/asp:TextBox&gt;
</code></pre>

<p>in javascript</p>

<pre><code>function maxlength()
        {

            var max = 500;
            if ($('.dd').focus().val().length &gt; max)
            {
                $('.dd').val($('.dd').val().substr(0, max));
            }
            $('.charsRemaining').html('You have ' + (max - $('.dd').val().length) + ' characters remaining');
        }
</code></pre>

<p>it is working fine but when copying something and pasting it in textarea using mouse right click $('.dd').focus().val() is coming as empty string. what to do </p>
