Focus when enter keypress

Focus when enter keypress

heya !!!

i need one easy help 
i trying to move focus to next field when enter keypress , but not working , this is my jqueryCode and HTML

this is my HTML
  1.    <table border="0" width="29%">
  2.    <tr>
  3.      <td align="right">&nbsp;Conta D</td>
  4.      <td>&nbsp;<input type="text" name="contad" id="contad"></td>
  5.    </tr>

  6.     <tr>
  7.       <td align="right">&nbsp;Conta C</td>
  8.       <td>&nbsp;<input type="text" name="contac" id="contac"></td>
  9.     </tr>

  10.    <tr>
  11.       <td align="right">&nbsp;DOC</td>
  12.       <td>&nbsp;<input type="text" name="doc" id="doc"></td>
  13.    </tr>

  14.    <tr>
  15.       <td align="right">&nbsp;Valor </td>
  16.       <td>&nbsp;<input type="text" name="valor" id="valor"></td>
  17.    </tr>

  18.    <tr>
  19.       <td align="right">&nbsp;HP</td>
  20.       <td>&nbsp;<input type="text" name="hp" id="hp"></td>
  21.    </tr>

  22.    <tr>
  23.       <td align="right">&nbsp;HP Var</td>
  24.       <td>&nbsp;<textarea cols="30" id="hpvar" name="hpvar" rows="4"></textarea></td>
  25.    </tr>
  26.     </table>
jquery
  1.           $("table").find('#contad, #contac,  #doc, #valor,  #hp, #hpvar').keypress(function(e){
  2.                var field = $(this).next('#contad, #contac, #doc, #valor, #hp, #hpvar');
  3.                var key =  e.keyCode ? e.keyCode : e.which;
  4.                 if(key == 13)
  5.                 {
  6.                     field.focus();
  7.                     return false;
  8.                 }
  9.           });