[jQuery] disable all element in a table?

[soni2926]

hi,
i have a table which has elements in it, input, dropdown, and i want
them disabled at certain times, can i do this is jquery? any examples?
suppose table is like:
<table cellpadding="0" cellspacing="5" border="0" id="testTable">
<tr>
     <td class="Column">
      Phone:
      </td>
     <td class="Column">
            <input name=TextBox1" type="text" id="TextBox1" />
     </td>
      <td class="Column">
            Type:
       </td>
        <td class="Column">
              <select name="DropDownList1" id="DropDownList1">
                  <option value="Op1">Op1</option>
                  <option value="Op2">Op2</option>
                  <option value="Op3">Op1</option>
              </select>
        </td>
</tr>
</table>

And at certain conditions i want to display all of those elements,
anyway to do that? i'm still learning jquery, but i know this disables
the table:
$('#testTable').attr("disabled", true);
but the elements are still active. anyway to loop through each and
stop them? i tried:
$('#testTable > tr').attr("disabled", true);
but that didn't work, plus i don't know if disabling the row would
work, same with this:
$('#testTable > input').attr("disabled", true);

Thanks.