js this获取元素ID

　　　　<table id="cyyj_table" class="table01" cellpadding="5" cellspacing="1"> ???????????<tbody id="tb"> ????????????<#list li as li> ????????????<tr id=‘${li.id}‘> ????????????<td width="80%"> ????????????<input id =‘${li.id}‘ class="customold" style="width:85%" ?value=‘${li.custom}‘/> ????????????</td> ????????????<td align="center"> ????????????<input class="ordold" style="width:52px" type="number" value=‘${li.ord}‘/> ????????????</td> ????????????<td align="center"> ????????????<a class="zxui-linkbutton" ?onclick="detCus(‘${li.id}‘);">删除</a> ????????????</td> ????????????</tr> ????????????</#list> ???????????</tbody> ???????</table>

$(".customold").each(function(){var customold = $(this).val();var obj = $(this);var customoldid = $(obj).attr(‘id‘);customolds+=customold+‘,‘;customoldids+=customoldid+‘,‘;});