現在のノードの下の1番目の要素のテキスト内容を取得

<tr id="gridTreeTrid14101" class="" style="" onmouseout="changeClassName(this,'')" onmouseover="changeClassName(this,'GridHighLightRow')">
<td class="GRIDTREESTYLE">
<img border="0" align="absmiddle" src="/images/tree/empty.gif">
<img border="0" align="absmiddle" src="/images/tree/line.gif">
<img border="0" align="absmiddle" src="/images/tree/line.gif">
<img border="0" align="absmiddle" src="/images/tree/join.gif">
 
</td>
<td>
<input type="checkbox" value="14101" name="salecatIds">
</td>
</tr>

function setValue() {
            var salecatIds = "";
            var salecatNames = "";
            $('input:checkbox[name="salecatIds"]:checked').each(function(){
                var catId = $(this).val();
                var catName = $('#gridTreeTrid'+catId).children().first().text();
                salecatIds += catId + ",";
                salecatNames += "," + catName;
            });

            salecatNames = salecatNames.substring(1);
            alert(salecatNames);

        }