jQuery层筛选器

<script type="text/javascript">
        $(document).ready(function () {
            $(".leftdiv").click(function () {
                $(".leftdiv").css({ "background-image": "url(http://localhost:1662/WebSite/images/designer_leftbutton_inactive.png)" });
                $(".leftdiv2").css({ "background-image": "url(http://localhost:1662/WebSite/images/designer_leftbutton_inactive.png)" });
                $(".leftdiv2 > p").css({ color: "#666666" });
                $(this).css({ "background-image": "url(http://localhost:1662/WebSite/images/designer_leftbutton_active.png)" });
                
                $(this + "div").css({ "background-image": "url(http://localhost:1662/WebSite/images/designer_leftbutton_active.png)" });
                $(this > "p").css({ color: "White" });
            });
        });
    </script>
<div class="leftdiv" style="height:60px; color:White; background-image:url(images/designer_leftbutton_active.png);">
                <p style="font-size:14px; color:White; ">1. MODEL</p>
                <p style="font-size:10px; color:White;  margin-top:-13px;">Ments,Normal fit,Long</p>
                <p style="font-size:10px; color:White; margin-top:-13px;">seleve</p>
                </div><div class="leftdiv2" style="background-image:url(images/designer_leftbutton_active.png);"></div>
                <div class="leftdiv">
                    <p style="font-size:14px; ">1. FABRIC</p>
                    <p style="font-size:10px;  margin-top:-13px;">Elbrus,white</p>
                </div><div class="leftdiv2"></div>
                <div class="leftdiv">
                    <p style="font-size:14px; ">1. COLLAR</p>
                    <p style="font-size:10px;  margin-top:-13px;">Business</p>
                </div><div class="leftdiv2"></div>
                <div class="leftdiv" style="height:60px;">
                    <p style="font-size:14px;">1. CUFF</p>
                    <p style="font-size:10px; margin-top:-13px;">Single,button,Beveled,</p>
                    <p style="font-size:10px;margin-top:-13px;">Small slevet button</p>
                </div><div class="leftdiv2"></div>
在javaScript用‘this’关键字做为层筛选器的参数的时候（红色部分），为什么获取不到？？哪里有问题？？