title: Filter jQuery dataTables on negative integer
body: <p>I can sort a dataTable on negatives just fine, but I wanted to filter instead of sort on a select.change() event. Basically, I just need it to take the value of column 4 and render the row based on the select box selection { all, positive, or negative }.</p>
  
  <pre><code>&lt;table class="data-table"&gt;
      &lt;thead&gt;
        &lt;tr&gt;
          &lt;th&gt;Text&lt;/th&gt;
          &lt;th&gt;Text&lt;/th&gt;
          &lt;th&gt;Text&lt;/th&gt;
          &lt;th&gt;Value&lt;/th&gt;
        &lt;/tr&gt;
      &lt;/thead&gt;
      &lt;tbody&gt;
        &lt;tr&gt;
           &lt;td&gt;Lorem&lt;/td&gt;
           &lt;td&gt;Ipsum&lt;/td&gt;
           &lt;td&gt;Dolor&lt;/td&gt;
           &lt;td&gt;$1.99&lt;/td&gt;
        &lt;/tr&gt;
        &lt;tr&gt;
           &lt;td&gt;Lorem&lt;/td&gt;
           &lt;td&gt;Ipsum&lt;/td&gt;
           &lt;td&gt;Dolor&lt;/td&gt;
           &lt;td&gt;$2.99&lt;/td&gt;
        &lt;/tr&gt;
        &lt;tr&gt;
           &lt;td&gt;Lorem&lt;/td&gt;
           &lt;td&gt;Ipsum&lt;/td&gt;
           &lt;td&gt;Dolor&lt;/td&gt;
           &lt;td&gt;$-1.99&lt;/td&gt;
        &lt;tr&gt;
           &lt;td&gt;Lorem&lt;/td&gt;
           &lt;td&gt;Ipsum&lt;/td&gt;
           &lt;td&gt;Dolor&lt;/td&gt;
           &lt;td&gt;$-2.99&lt;/td&gt;
        &lt;/tr&gt;
        &lt;/tr&gt;
      &lt;/tbody&gt;
      &lt;tfoot&gt;
        &lt;tr&gt;
          &lt;td colspan="4"&gt;
            &lt;select class="select-filter"&gt;
              &lt;option value="1"&gt;All&lt;/option&gt;
              &lt;option value="2"&gt;Positive&lt;/option&gt;
              &lt;option value="3"&gt;Negative&lt;/option&gt;
            &lt;/select&gt;
        &lt;/tr&gt;
      &lt;/tfoot&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>Then I've tried a couple of js:</p>
  
  <pre><code>$(function(){
      $(".data-table").dataTable();
      $('.select-filter').change(function(){oTable.fnDraw();});
  });
  </code></pre>
  
  <p>But the one that "looks" easiest to make do what I want is:</p>
  
  <pre><code>$(".data-table").dataTable().columnFilter({
      aoColumns: [
        null,
        null,
        null,
        {type: "select"}
      ]
  });
  </code></pre>
  
  <p>Although, that one will just create a select that contains all the values. How can I accomplish this?</p>