jquery why isn't this working?
<pre><code>$(document).ready(function()
{
    $('#comment textarea').click(function()
    {
        if (this.value == this.'Post a comment')
        {
            this.value = '';
        }
    });

    $('#comment textarea').blur(function()
    {
        if (this.value == '')
        {
            this.value = this.'Post a comment';
        }
    });
});
</code></pre>

<p>I have this bit of script stuck on a php file.  However it is not functioning.  The textarea's default value is Post a comment.  This script should change the textarea's value to null on click, and then on blur change it back to post a comment.</p>
