slideDown, slideUp not working in jQuery -

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hi friends slidedown , slideup function not working code. appears hidden row without slidedown effect please guys can chekc code below or see fiddle here

html

<table> <tr>     <td colspan="2"><p>logistics</p>       <select name=" " >         <option>one</option>         <option>two</option>         <option>three</option>         <option>four</option>         <option>others</option>       </select>     </td>   </tr>   <tr>     <td width="80%" colspan="2"><textarea name=" 5" rows="2" id=" 5" onblur="if (this.value=='') this.value = this.defaultvalue" onfocus="if (this.value==this.defaultvalue) this.value = ''">others details</textarea>       </td>   </tr> </table>

script

$('tr').has('textarea').hide(); $('select').on('change',function(){     if($(this).val()=='others')     {         //$(this).next('tr td').has('textarea').slidedown(200);         $(this).parent('td').parent('tr').next('tr').slidedown(200);         //alert('other')         }     else     {         //$(this).next('tr td').has('textarea').slidedown(200);         $(this).parent('td').parent('tr').next('tr').slideup(200);         //alert('other')         }     })

check demo jsfiddle

jquery

$('tr').not(':first').children('td').wrapinner('<div>'); $('select').on('change',function(){     if($(this).val()=='others')     {         $('td > div').slidedown(2000, function() {             $(this).parent().slidedown(2000);         });     }     else     {         $('td > div').slideup(1000, function() {             $(this).parent().slideup();         });     } });

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