dwz 的td添加table(class="list")

return this.each(function(){
var $this = $(this);
var $trs = $this.find('tbody>tr');
var $grid = $this.parent(); // table
var nowrap = $this.hasClass("nowrap");
//当table类名为list时，添加title提示语
$trs.each(function(){
$(this).children("td").mouseover(function () {
$(this).attr("title", $(this).text());
});
$(this).children("td").css("white-space","nowrap");
});