count of tr with style property empty
<p>Here is my html</p>

<pre><code>&lt;table id="tbl1"&gt;
  &lt;tbody &gt;
         &lt;tr class="hide_grid_header"&gt;&lt;/tr&gt;
         &lt;tr style="display: none;"&gt;&lt;/tr&gt;
         &lt;tr style="display: none;"&gt;&lt;/tr&gt;
          &lt;tr &gt;&lt;/tr&gt;
         &lt;tr style=""&gt;&lt;/tr&gt;
         &lt;tr &gt;&lt;/tr&gt;
         &lt;tr style=""&gt;&lt;/tr&gt;
         &lt;tr &gt;&lt;/tr&gt;
       &lt;tr style="display: none;"&gt;&lt;/tr&gt;
  &lt;/tbody&gt;
&lt;/table&gt;
</code></pre>

<p>From this, I want count of tr which dont have style property OR with style=" "
property.</p>

<p>i'm using below code, but its giving me count as 8 instead of 5.</p>

<pre><code> var docs = jQuery("#tbl").find('tbody').find('tr:visible');
alert(docs.length);
</code></pre>
