我下面有一個函數(shù)，僅在選中同一tr中的復(fù)選框時才觸發(fā)。請告訴我我在做什么錯，通常的方法不起作用。謝謝JS$(".add_menu_item_table").live('click', function() {  var value_td = $(this).parents('tr').find('td.td_name').text();  if ($('input.checkbox_check').attr(':checked')); {    var newDiv = $('<div class="div_menu_button"></div>');    var showDiv = $('<div id="show' + "0" + numShow++ + '" class="menu_button_info hidden"></div>');    var toggleTrigger = $('<a id="toggleshow' + "0" + numToggle++ + '" data-target="#show' + "0" + numTarget++ + '" class="toggle_trigger actions">&nbsp;</a><div style="padding:5px"></div>');    var menuForm = $('<form id="menu_edit_form' + "0" + numForm++ + '" class="menu_creation_form"></form>');    $('#created_buttons_list').append(      newDiv.text(value_td)    );    newDiv.wrap("<li></li>");    newDiv.append(toggleTrigger);    newDiv.append(showDiv);    showDiv.append(menuForm);  }});var numToggle = 0;var numShow = 0;var numTarget = 0;var numForm = 0;var numLabelone = 0;var numLabeltwo = 0;var numLabelthree = 0;<table width="316px" border="0" cellspacing="0" cellpadding="0" id="table-data">  <tbody>    <tr>      <td width="20px"><input type="checkbox" style="width:20px;" value="1" name="checkbox"></td>      <td width="200px"><a href="/admin/feedbackmanager/sortby/2/sortdesc/0">Page Name</a></td>      <td width="20px"><a href="/admin/feedbackmanager/sortby/3/sortdesc/0">Add</a></td>    </tr>    <tr>      <td><input type="checkbox" style="width:20px;" value="1" name="checkbox" class="checkbox_check"></td>      <td class="td_name">Timeplot</td>      <td><input class="add_menu_item_table" name="add_menu_item" value="Add" type="button"></td>    </tr>    <tr>      <td><input type="checkbox" style="width:20px;" value="1" name="checkbox" class="checkbox_check"></td>      <td class="td_name">Operations Manuals</td>      <td><input class="add_menu_item_table" name="add_menu_item" value="Add" type="button"></td>    </tr>     </tbody></table>