Select next span by class name in a table

Select next span by class name in a table

Hi,

by clicking on a span i want to select next span somewhere in a table. My example:


  1. <table  class="month_table"  cellspacing="0"  cellpadding="0"  border="0" >
        <tr >
            <td  class="day" >
                <span  class="span_day" > 1</span>
            </td>
            <td  class="day" >
                <span  class="span_day"> 2</span>
            </td>
            <td  class="day" >
                <span  class="span_day" > 3</span>
            </td>
        </tr>
        <tr >
            <td  class="day" >
                <span  class="span_day" > 4</span>
            </td>
            <td  class="day" >
                <span  class="span_day" > 5</span>
            </td>
            <td  class="day" >
                <span  class="span_day" > 6</span>
            </td>
        </tr>

    </table>
    1. So if i click on 2 i want to addClass "last" to 3.
      OR
      If i click 3 i want to addClass "last" to 4.

      Always the next "span_day" should be get the class "last"