获取Jquery对象数组下标_www.
   
        #main{width:600px;border:1px solid green;margin:auto;padding:10px;}
        #tbl{border-collapse:collapse;border-top:1px solid red;border-left:1px solid red;margin:auto;}
        #tbl td{width:60px;height:60px;border-collapse:collapse;border-bottom:1px solid red;border-right:1px solid red;}
   
   
   
        var oldColor;
        $(function () {
            $("#tbl tr").hover(
            function () {
                oldColor = $(this).css("backgroundColor");
                $(this).css("backgroundColor", "yellow");
            },
            function () {
                $(this).css("backgroundColor", oldColor);
            });
            $("#tbl tr").click(function () {
                alert($("#tbl tr").index($(this))); //获取元素下标
            });
        });