title: Hide first row of html table 2 having no class and no id attributes
body: <p>i have two html tables in <strong>iframe</strong> tag, having no class nor id attributes.
  I am trying to use jQuery to find the second table first row and hide it?
  my tables are looks like this:
  Note: basically I have two tables, and both the tables are inside the iframe tag. I need to hide the second table first row?</p>
  
  <pre><code>&lt;table&gt;
    &lt;tr&gt;
          &lt;td&gt; 1 &lt;/td&gt;
           .
           .
           .
   &lt;/tr&gt; 
  &lt;/table&gt;
  </code></pre>
  
  <p><strong>I need to hide the first row of the following table:</strong> </p>
  
  <pre><code>&lt;table&gt;
     &lt;tr&gt;
       &lt;td&gt; This row i need to hide() &lt;/td&gt;
     &lt;/tr&gt;
    &lt;/table&gt;
  </code></pre>
  
  <p>I have tried too may ways like this:</p>
  
  <pre><code>      $( "table[1] tr:first" ).css("display", "none" );
  </code></pre>
  
  <p>but having no results...
  Please help.</p>