title: Select all checkbox elements except disabled ones
body: <p>I want to select all <code>checkbox</code> elements expect disabled ones,</p>
  
  <p>this is my html</p>
  
  <pre><code>&lt;input id="chkSelectAll" class="checkbox" type="checkbox" /&gt;Select All
  
  &lt;div id="ContentPlaceHolder1_listItem_pnlDis_0"&gt;
      &lt;input id="checkApproved" type="checkbox" name="checkApproved" checked="checked" disabled="disabled"&gt;
  &lt;/div&gt;
  &lt;div id="ContentPlaceHolder1_listItem_pnlDis_8" class="dis"&gt;
      &lt;input id="checkApproved" type="checkbox" name="ctl00$ContentPlaceHolder1$listItem$ctrl8$checkApproved"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>jQuery</p>
  
  <pre><code>$('#chkSelectAll').click(function () {
      var checked_status = this.checked;
      //   alert(checked_status);
      $('div#item input[type=checkbox]').each(function () {
          this.checked = checked_status;
      });
  })
  </code></pre>
  
  <p>it's working for selecting all <code>checkbox</code> elements but I want to skip disabled ones.</p>
  
  <p>How can I do that?</p>