jQuery实现鼠标滑过导航栏呈现不同的样式

素材图片

源码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title> 凡客诚品帮助中心页面</title>
    <style type="text/css" >
        *{
            margin:0px;
            padding:0px;
            font-size:12px;
        }
        #bodyDiv{
            position:relative;
            background:#FFF url("images/bg1.jpg") no-repeat;
            width:1016px;
            height:1176px;
            margin:0 auto;
        }

        .search{
            position:absolute;
            left:125px;
            top:258px;
            height:24px;
            line-height:24px;
            width:325px;
            color:#999;
        }

        .tab{
            position:absolute;
            left:276px;
            top:397px;

        }
        #tab_bg{
            width: 700px;
            height: 36px;
            line-height: 36px;
            cursor: pointer;
        }
        .tab_bg0 {
            background: url(images/news_bghover.gif) 0px 0px;

        }
        .tab_bg1 {

            background: url(images/news_bghover.gif) 0px -36px;

        }
        .tab_bg2 {

            background: url(images/news_bghover.gif) 0px -72px;

        }
        .tab_bg3 {

            background: url(images/news_bghover.gif) 0px -108px;

        }
        .tab_bg4 {

            background: url(images/news_bghover.gif) 0px -144px;

        }
        a{
            color:#000;
            text-decoration:none;
        }
        .tab_common {
            width: 140px;
            height: 36px;
            line-height: 36px;
            float: left;
            text-align: left;
            cursor: pointer;
            text-indent: 40px;
        }

        .tab_current {
            width: 140px;
            height: 36px;
            line-height: 36px;
            float: left;
            text-align: left;
            cursor: pointer;
            color: #ffffff;
            text-indent: 40px;
        }
        .tab_current a{color:#fff;}

        .jiejue2{
            position:absolute;
            left:817px;
            top:750px;
        }
        /*nav*/
        #nav{
            position:absolute;
            top:366px;
            left:26px;
        }
        #nav ul{
            list-style:none;
        }
        #nav ul li{
            display:block;
            width:196px;
            line-height:30px;
            border-bottom:1px solid #999;
        }
        #nav ul li div.first{
            text-indent:20px;
            border-bottom:1px solid #999;
        }
        #nav ul.second{
            display:none;
        }

        #nav ul.second li{
            display:block;
            width:166px;
            padding-left:30px;
            height:30px;
            line-height:30px;
            border:none;
        }

    </style>
    <script src="js/jquery-1.11.3.min.js"></script>
    <script>
       $(function () {
           $(".first").click(function () {
               $(".second").show();
               $(this).next().hide();
           })
           $("#tab_bg >div").mouseover(function () {
               $(this).siblings("div").attr("class","tab_common");
               $(this).attr("class","tab_current");
               $(this).parent().attr("class",'tab_bg'+$(this).index());
           })
           //下面的代码同样可以实现改变样式
//            $(".tab_current,.tab_common").mouseover(function () {
//            var v=$(this).children("a").text();
//                switch (v){
//                    case "1.新用户注册":
//                        $(this).parent().attr('class',"tab_bg0");
//                        break;
//                    case "2.挑选商品":
//                        $(this).parent().attr('class',"tab_bg1");
//                        break;
//                    case "3.确认下单":
//                        $(this).parent().attr('class',"tab_bg2");
//                        break;
//                    case "4.订单跟踪":
//                        $(this).parent().attr('class',"tab_bg3");
//                        break;
//                    case "5.验货签收":
//                        $(this).parent().attr('class',"tab_bg4");
//                        break;
//                }
//            })
           $("input[name='IsAvail']").click(function () {
               if($(this).val()==0){
                   $(".wenti").show();
               }else{
                   $(".wenti").hide();
               }
           })

       })
    </script>
</head>
<body>
<div id="bodyDiv">
    <!-- 输入框 -->
    <input type="text" value="请输入要查询的问题"  name='search'  class='search'/>
    <!-- 左边导航 -->
    <div id='nav'>
        <ul>
            <li>
                <div class='first'>账号管理</div>
                <ul class='second'>
                    <li>账号注册</li>
                    <li>找回密码</li>
                    <li>账户关联登录</li>
                    <li>账号常见问题</li>
                </ul>
            </li>
            <li>
                <div class='first'>购物指南</div>
                <ul class='second'>
                    <li>购物指南1</li>
                    <li>购物指南2</li>
                    <li>购物指南3</li>
                    <li>购物指南4</li>
                </ul>
            </li>

            <li>
                <div class='first'>配送方式</div>
                <ul class='second'>
                    <li>配送方式1</li>
                    <li>配送方式2</li>
                    <li>配送方式3</li>
                    <li>配送方式4</li>
                </ul>
            </li>
            <li>
                <div class='first'>支付方式</div>
                <ul class='second'>
                    <li>支付方式1</li>
                    <li>支付方式2</li>
                    <li>支付方式3</li>
                    <li>支付方式4</li>
                </ul>
            </li>

        </ul>
    </div>
    <!-- 流程 -->
    <div class="tab">
        <div id="tab_bg" class="tab_bg0">
            <div   class="tab_current">
                <a name="index_gwlc_1" class="track" href="#">1.新用户注册</a>
            </div>
            <div   class="tab_common">
                <a name="index_gwlc_2" class="track" href="#">2.挑选商品</a>
            </div>
            <div  class="tab_common">
                <a name="index_gwlc_3" class="track" href="#">3.确认下单</a>
            </div>
            <div  class="tab_common">
                <a name="index_gwlc_4" class="track" href="#">4.订单跟踪</a>
            </div>
            <div   class="tab_common">
                <a name="index_gwlc_5" class="track" href="#">5.验货签收</a>
            </div>
        </div>
    </div>

    <!-- 提交问题 -->

    <div class="jiejue2">

        <h3>这条帮助是否解决了您的问题？</h3>
        <div class="qiehuan">
            <input name="IsAvail" type="radio" value="1" checked="checked"  /> 已解决
            <input name="IsAvail" type="radio" value="0"  /> 未解决
            <input id="ContID" type="hidden" value="1"/>
        </div>

        <div class="wenti" style="display:none">
            <p>问题没解决？请选择原因:</p>
            <p><select name="TrackID" id="TrackID"  >
                <option value="1">文字太多，阅读困难</option>
                <option value="2">内容复杂，看不懂</option>
                <option value="3">描述不清楚</option>
                <option value="99">其他原因</option>
            </select></p>
            <div id="TrackContentDiv" style=" display:none;">
                <p>也可以直接填写原因:</p>
                <p><textarea name="TrackContent" id="TrackContent" cols="45" rows="5"  ></textarea></p>
            </div>
        </div>
        <p class="wenti_result"><a href=" "><img src="data:images/submit_bt.jpg"/></a></p>
    </div>

</div>

</body>
</html>