<tr>
 <td>
      <input type="text" name="duration[]">
 </td>
 <td>
      <input type="text" name="start[]">
 </td>
 <td>
       <input type="text" name="wait[]">
 </td>
 <td>
       <input type="text" name="end[]">
 </td>
</tr>

I have such multiple rows. I need to fetch the values off all tds on keyup event on the td with input name start. Since they are many i cannot go with ids, need help in parent child approach with jquery.

I was able to reach parent tr on keyup event on the above mentioned td but not able to access values of input field in other tds. the jquery code i used

$(document).ready(function(){
    $(".start").keyup(function(){
        alert($(this).parent().get(-3).tagName);
    })
});