JS宣傳頁項目-綜合實戰

時間 2020-01-03

原文原文鏈接

按照國際慣例先放圖javascript

index.htmlcss

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>demo</title>
    <!-- 基本樣式 -->
    <link rel="stylesheet" href="style.css">
    <!-- 動畫效果 -->
    <link rel="stylesheet" href="animate.css">
</head>
<body>
    <!-- 導航 -->
    <header class="header">
        <div class="header_wrap">
            <div class="header_logo">XX手機</div>
            <nav class="header_nav">
                <a href="javascript:;" class="header_nav_item header_nav_item_active">首頁</a>
                <a href="javascript:;" class="header_nav_item">外觀</a>
                <a href="javascript:;" class="header_nav_item">配置</a>
                <a href="javascript:;" class="header_nav_item">型號</a>
                <a href="javascript:;" class="header_nav_item">說明</a>
                <a href="javascript:;" class="header_nav_item header_nav_item_btn">當即購買</a>
                <div class="header_nav_tip"></div>
            </nav>
        </div>
    </header>
    <!-- 第一屏 -->
    <div class="screen_1">
        <h2 class="screen_1_heading screen_1_heading_animate_init"><b>XX手機</b> 讓你的生活更精彩</h2>
        <div class="screen_1_phone screen_1_phone_animate_init"></div>
        <div class="screen_1_shadow screen_1_shadow_animate_init"></div>
    </div>
    <!-- 第二屏 -->
    <div class="screen_2">
        <h2 class="screen_2_title">優美的設計，更使人着迷</h2>
        <h3 class="screen_2_subtitle">採用受歡迎的設計，讓它更加出色。<br>款式小巧、輕便手感更溫馨。絢麗高清的顯示屏，整個外觀顯得格外精緻。</h3>
        <div class="screen_2_phone">
            <div class="screen_2_phone_point screen_2_phone_point1">高清攝像</div>
            <div class="screen_2_phone_point screen_2_phone_point2">超薄機身</div>
            <div class="screen_2_phone_point screen_2_phone_point3">大屏顯示</div>
        </div>
    </div>
    <!-- 第三屏 -->
    <div class="screen_3">
        <div class="screen_3_wrap">
            <h2 class="screen_3_title">外形小巧，功能強大的手機</h2>
            <h3 class="screen_3_subtitle">採用受歡迎的設計，讓它更加出色。<br> 款式小巧、輕便手感更溫馨。絢麗高清的顯示屏，整個外觀顯得格外精緻。</h3>
            <div class="screen_3_phone"></div>
            <div class="screen_3_feature">
                <div class="screen_3_feature_item">
                    <div class="screen_3_feature_item_big">5.7</div>
                    <div class="screen_3_feature_item_small">英寸大屏</div>
                </div>
                <div class="screen_3_feature_item">
                    <div class="screen_3_feature_item_big">1200</div>
                    <div class="screen_3_feature_item_small">萬像素</div>
                </div>
                <div class="screen_3_feature_item">
                    <div class="screen_3_feature_item_big">3D</div>
                    <div class="screen_3_feature_item_small">touch</div>
                </div>
                <div class="screen_3_feature_item">
                    <div class="screen_3_feature_item_big">A9</div>
                    <div class="screen_3_feature_item_small">處理器</div>
                </div>
            </div>
        </div>
    </div>
    <!-- 第四屏 -->
    <div class="screen_4">
        <div class="screen_4_wrap">
            <h2 class="screen_4_heading">豐富的手機型號</h2>
            <h3 class="screen_4_subheading">找到適合你的手機</h3>
            <div class="screen_4_type">
                <div class="screen_4_type_item screen_4_type_item_i_1">
                    <div class="screen_4_type_item_color">慕課紅</div>
                    <div class="screen_4_type_item_storage">16G/32G/64G</div>
                </div>
                <div class="screen_4_type_item screen_4_type_item_i_2">
                    <div class="screen_4_type_item_color">土豪金</div>
                    <div class="screen_4_type_item_storage">16G/32G/64G</div>
                </div>
                <div class="screen_4_type_item screen_4_type_item_i_3">
                    <div class="screen_4_type_item_color">太空灰</div>
                    <div class="screen_4_type_item_storage">16G/32G/64G</div>
                </div>
                <div class="screen_4_type_item screen_4_type_item_i_4">
                    <div class="screen_4_type_item_color">紳士黑</div>
                    <div class="screen_4_type_item_storage">16G/32G/64G</div>
                </div>
            </div>
        </div>
    </div>
    <!-- 第五屏 -->
    <div class="screen_5">
        <h2 class="screen_5_heading">遊戲、學習、拍照、有這一部就夠了</h2>
        <h3 class="screen_5_subheading">看視頻、拍攝高清視頻與照片、視頻聊天、一機多功能，讓您生活更豐富精彩。</h3>
        <div class="screen_5_bg"></div>
    </div>
    <!-- 底部 -->
    <div class="screen_buy">
        <a class="screen_buy_btn" href="javascript:;">當即購買</a>
    </div>
    <footer class="footer">
        © 2019 test.com 京ICP備xxxxxxxx號
    </footer>
    <!-- 側導航 -->
    <div class="outline">
        <a href="javascript:;" class="outline_item outline_item_active">首頁</a>
        <a href="javascript:;" class="outline_item">外觀</a>
        <a href="javascript:;" class="outline_item">配置</a>
        <a href="javascript:;" class="outline_item">型號</a>
        <a href="javascript:;" class="outline_item">說明</a>
    </div>
    <script src="script.js"></script>
</body>
</html>

style.csshtml

*{
    margin: 0;
    padding: 0;
}
body{
    background-color: #fff; 
    font-size: 12px;
    font-family: "Microsoft Yahei","微軟雅黑"
}
a{
    text-decoration: none;
}
/*導航*/
header{
    background-color: #f7f7f7;
}
.header_wrap{
    height:80px;
    width:1200px;
    margin:0 auto;
    position: relative;
}
.header_logo{
    background:url(img/logo.png) no-repeat;
    width:150px;
    height:40px;
    line-height: 40px;
    text-indent:50px;
    position: absolute;
    top:50%;
    margin-top:-20px;
    font-size:20px;
}
.header_nav{
    position: absolute;
    right:25px;
    height:40px;
    line-height: 40px;
    top:50%;
    margin-top:-20px;
}
.header_nav_item{
    display: block;
    float: left;
    padding-left:48px;
    color:#292f35;
    font-size:14px;
    width:30px;
    text-align: center;
    position: relative;
}
.header_nav_item_active{
    color:#f01400;
}
/*.header_nav_item_active::after{
    content:' ';
    position: absolute;
    width:31px;
    height:2px;
    background-color: #f01400;
    top:35px;
    left:-1px;
}*/
.header_nav_item_btn{
    width:90px;
    background:#07111b;
    color:white;
    border-radius:5px;
    padding:0 5px;
    margin-left:48px;
}
/*第一屏*/
.screen_1{
    height: 800px;
    background-color: #e7e7e7;
    position: relative;
    overflow: hidden;
    background:url(img/bg-screen-1.png) no-repeat center;
    background-size: cover;
}
.screen_1_heading{
    font-weight: normal;
    margin: 0;
    padding: 0;
    font-size:46px;
    color: #4d555d;
    text-align: center;
    padding-top: 152px;
}
.screen_1_heading b{
    color: #f01400;
    font-weight: normal;
}
.screen_1_phone{
    width: 1375px;
    height: 305px;
    background:url(img/screen-1-phone.png) no-repeat center;
    position: absolute;
    left: 50%;
    margin-left: -687px;
    bottom: 180px;
    z-index: 2;
}
.screen_1_shadow{
    width: 1233px;
    height: 411px;
    background:url(img/screen-1-shadow.png) no-repeat center;
    position: absolute;
    left: 50%;
    margin-left: -616px;
    bottom: 30px;
    z-index: 1;
    opacity: .8;
}
/*第二屏*/
.screen_2{
    text-align: center;
    padding-top:56px;
    background:#fafafa;
}
.screen_2_title{
    color:#f01414;
    font-size:48px;
    font-weight:normal;
}
.screen_2_subtitle{
    color:#07111b;
    font-size:16px;
    font-weight:normal;
    margin-top:15px;
    line-height:2em;
    margin-bottom:40px;
}
.screen_2_phone{
    width:1200px;
    margin:0 auto;
    background:url(img/screen-2-phone.png) top center no-repeat;
    height:579px;
    overflow:hidden;
    position: relative;
}
.screen_2_phone_point{
    position: absolute;
    width: 230px;
    height: 48px;
    padding-right: 20px;
    line-height: 48px;
    background: url(img/icon-point-right.png) right no-repeat;
}
.screen_2_phone_point1{
    top: 146px;
    left: -56px;
}
.screen_2_phone_point2{
    background: url(img/icon-point-left.png) left no-repeat;
    top: 25px;
    right: 235px;
}
.screen_2_phone_point3{
    background: url(img/icon-point-left.png) left no-repeat;
    top: 319px;
    right: 135px;
}
/*第三屏*/
.screen_3{
    height:803px;
    background:url(img/bg-screen-3.png) no-repeat;
    overflow:hidden;
}
.screen_3_wrap{
    width:1200px;
    margin:0 auto;
    color:#fff;
    position: relative;
}
.screen_3_title{
    font-size:48px;
    padding-top:84px;
    font-weight:normal;
}
.screen_3_subtitle{
    font-size:16px;
    font-weight:normal;
    margin-top:34px;
    line-height:30px;
}
.screen_3_phone{
    width: 800px;
    background: url(img/screen-3-phone.png) top right no-repeat;
    height: 657px;
    position: absolute;
    right: 0;
    top: 200px;
    background-size: 90%;
}
.screen_3_feature{
    width:400px;
    position:absolute; 
    top:380px;
    left:0;
}
.screen_3_feature_item{
    width:176px;
    height:125px;
    border:1px solid #fff;
    border-radius:5px;
    text-align: center;
    padding-top:30px;
    margin-right:22px;
    float: left;
    margin-bottom:25px;
}
.screen_3_feature_item_big{
    font-size:48px;
}
.screen_3_feature_item_small{
    font-size:16px;
}
/*第四屏*/
.screen_4{
    background-color: #ffffff;
    height: 800px;
    position: relative;
    overflow: hidden;
}
.screen_4_wrap{
    width: 1200px;
    height: auto;
    margin: 0 auto;
    position: relative;
}
.screen_4_heading{
    font-size:48px;
    line-height: 48px;
    color: #f01400;
    text-align: center;
    padding-top: 135px;
    font-weight:normal;
}
.screen_4_subheading{
    font-size:16px;
    color: #464a4f;
    text-align: center;
    padding-top: 29px;
    line-height: 28px;
    font-weight:normal;
}
.screen_4_type{
    width: 1260px;
    height: 270px;
    position: absolute;
    top: 304px;
    margin-left: 30px;
}
.screen_4_type_item{
    width: 220px;
    margin-right: 90px;
    height: 270px;
    float: left;
    position: relative;
    text-align: center;
    background-size: cover;
}
.screen_4_type_item_color{
    width: 100%;
    height: 14px;
    line-height: 14px;
    font: 14px;
    color: #2c3238;
    position: absolute;    
    bottom: -44px;
}
.screen_4_type_item_i_1{
    background: url('img/phone-1.png') no-repeat left top;
}
.screen_4_type_item_i_2{
    background: url('img/phone-2.png') no-repeat left top;
}
.screen_4_type_item_i_3{
    background: url('img/phone-3.png') no-repeat left top;
}
.screen_4_type_item_i_4{
    background: url('img/phone-4.png') no-repeat left top;
}
.screen_4_type_item_storage{
    width: 100%;
    height: 12px;
    line-height: 12px;
    font: 12px;
    color: #a4a9ae;
    position: absolute;    
    bottom: -66px;
}
/*第五屏*/
.screen_5{
    height: 800px;
    position: relative;
    overflow: hidden;
    background-color: #d9dde1;
}
.screen_5_heading{
    font-size:48px;
    line-height: 48px;
    color: #f01400;
    text-align: center;
    padding-top: 130px;
    font-weight:normal;
}
.screen_5_subheading{
    font-size:16px;
    color: #2c3137;
    text-align: center;
    padding-top: 25px;
    line-height: 28px;
    font-weight:normal;
}
.screen_5_bg{
    width: 1920px;
    height: 433px;
    background:url(img/bg-screen-5.png)  no-repeat center;    
    background-size: contain;
    position: absolute;
    left: 50%;
    margin-left: -960px;
    bottom: -100px;
}
/*底部*/
.screen_buy{
    height: 80px;
    padding: 120px 0;
    position: relative;
    overflow: hidden;
    background: #2b333b url('img/bg-screen-buy.png') center no-repeat;
    text-align: center;
}
.screen_buy_btn{
    height: 80px;
    width: 240px;
    text-align: center;
    line-height: 80px;
    font-size: 24px;
    color: #fff;
    background-color: #f01414;
    display: inline-block;
    border-radius: 3px;
    transition: all .5s;
}
.screen_buy_btn:hover{
    box-shadow: 0px 0px 10px rgba(0,0,0,.5);
}
.footer{
    height: 80px;
    line-height: 80px;
    text-align: center;
    color: #fff;
    font-size: 14px;
    background-color: #07111b;
}
/*側導航*/
.outline{
    width:66px;
    position: fixed;
    right:0;
    top:50%;
    margin-top:-98px;
    background-color: #fff;
    box-shadow: 0 0 5px rgba(0,0,0,.1);
}
.outline_item{
    display: block;
    color:#93999f;
    font-size:12px;
    text-align: center;
    height:45px;
    line-height:45px;
    border-bottom:1px solid #c3c6c9;
    margin:0 20px;
}
.outline_item:last-child{
    border:none;
}
.outline_item_active{
    color:#f01400;
}
/*導航滑動門特效*/
.header_nav_tip{
    position: absolute;
    width:30px;
    height:2px;
    background-color:#f01400;
    bottom:0;
    left:0;
    margin-left:47px;
    transition:all 1s;
}

animate.css前端

/*第一屏*/
    /*screen_1_heading*/
    .screen_1_heading{
        transition: all 1s;
    }
    .screen_1_heading_animate_init{
        opacity: 0;
        transform:translate(0,100%);
    }
    .screen_1_heading_animate_done{
        opacity: 1;
        transform:translate(0,0);
    }
    /*screen_1_phone*/
    .screen_1_phone{
        transition: all 1s;
    }
    .screen_1_phone_animate_init{
        opacity: 0;
        transform:translate(0,-100%);
    }
    .screen_1_phone_animate_done{
        opacity: 1;
        transform:translate(0,0);
    }
    /*screen_1_shadow*/
    .screen_1_shadow{
        transition: all 1s;
    }
    .screen_1_shadow_animate_init{
        opacity: 0;
        transform:translate(0,-100%);
    }
    .screen_1_shadow_animate_done{
        opacity: 1;
        transform:translate(0,0);
    }

/*第二屏*/
    /*screen_2_title*/
    .screen_2_title{
        transition: all 1s;
    }
    .screen_2_title_animate_init{
        opacity: 0;
        transform: translate(0,-100%);
    }
    .screen_2_title_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_2_subtitle*/
    .screen_2_subtitle{
        transition: all 1s;
    }
    .screen_2_subtitle_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_2_subtitle_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_2_phone*/
    .screen_2_phone{
        transition: all 1s;
    }
    .screen_2_phone_animate_init{
        opacity: 0;
        transform: translate(0,50%);
    }
    .screen_2_phone_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_2_phone_point*/
    .screen_2_phone_point{
        transition: all 1s 1s;
    }
    .screen_2_phone_point1_animate_init{
        opacity: 0;
        transform: translate(-100%,0);
    }
    .screen_2_phone_point2_animate_init,
    .screen_2_phone_point3_animate_init{
        opacity: 0;
        transform: translate(100%,0);
    }
    .screen_2_phone_point_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }

/*第三屏*/
    /*screen_3_title*/
    .screen_3_title{
        transition: all 1s;
    }
    .screen_3_title_animate_init{
        opacity: 0;
        transform: translate(0,-100%);
    }
    .screen_3_title_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_3_subtitle*/
    .screen_3_subtitle{
        transition: all 1s;
    }
    .screen_3_subtitle_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_3_subtitle_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_3_phone*/
    .screen_3_phone{
        transition: all 1s;
    }
    .screen_3_phone_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_3_phone_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_3_feature*/
    .screen_3_feature{
        transition: all 1s;
    }
    .screen_3_feature_animate_init{
        opacity: 0;
        transform: scale(.5);
    }
    .screen_3_feature_animate_done{
        opacity: 1;
        transform: scale(1);
    }
    /*screen_3_feature_item*/
    .screen_3_feature_item{
        transition: all .5s;
        cursor: pointer;
    }
    .screen_3_feature_item:hover{
        transform: scale(1.1);
        border-color: #fff;
    }

/*第四屏*/
    /*screen_4_heading*/
    .screen_4_heading{
        transition: all 1s;
    }
    .screen_4_heading_animate_init{
        opacity: 0;
        transform: translate(0,-100%);
    }
    .screen_4_heading_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_4_subheading*/
    .screen_4_subheading{
        transition: all 1s;
    }
    .screen_4_subheading_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_4_subheading_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_4_type_item_i_1*/
    .screen_4_type_item_i_1{
        transition: all 1s .5s;
    }
    .screen_4_type_item_i_1_animate_init{
        opacity: 0;
    }
    .screen_4_type_item_i_1_animate_done{
        opacity: 1;
    }
    /*screen_4_type_item_i_2*/
    .screen_4_type_item_i_2{
        transition: all 1s 1s;
    }
    .screen_4_type_item_i_2_animate_init{
        opacity: 0;
    }
    .screen_4_type_item_i_2_animate_done{
        opacity: 1;
    }
    /*screen_4_type_item_i_3*/
    .screen_4_type_item_i_3{
        transition: all 1s 1.5s;
    }
    .screen_4_type_item_i_3_animate_init{
        opacity: 0;
    }
    .screen_4_type_item_i_3_animate_done{
        opacity: 1;
    }
    /*screen_4_type_item_i_4*/
    .screen_4_type_item_i_4{
        transition: all 1s 2s;
    }
    .screen_4_type_item_i_4_animate_init{
        opacity: 0;
    }
    .screen_4_type_item_i_4_animate_done{
        opacity: 1;
    }

/*第五屏*/
    /*screen_5_heading*/
    .screen_5_heading{
        transition: all 1s;
    }
    .screen_5_heading_animate_init{
        opacity: 0;
        transform: translate(0,-100%);
    }
    .screen_5_heading_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_5_subheading*/
    .screen_5_subheading{
        transition: all 1s;
    }
    .screen_5_subheading_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_5_subheading_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }
    /*screen_5_bg*/
    .screen_5_bg{
        transition: all 1s;
    }
    .screen_5_bg_animate_init{
        opacity: 0;
        transform: translate(0,100%);
    }
    .screen_5_bg_animate_done{
        opacity: 1;
        transform: translate(0,0);
    }

/*幀動畫*/
@-webkit-keyframes bounce{
    0%,100%{
        transform:scale(0);
    }
    50%{
        transform:scale(1);
    }
}
/*第二屏小圓點呼吸效果*/
    .screen_2_phone_point:before,
    .screen_2_phone_point:after{
        display: block;
        width:20px;
        height:20px;
        content:' ';
        background-color: rgba(255,0,0,.4);
        top:15px;
        position: absolute;
        -webkit-animation:bounce 2s infinite;
        border-radius: 50%;
    }
    .screen_2_phone_point:before{
        -webkit-animation:bounce 2s infinite 1s;
    }
    .screen_2_phone_point1:before,
    .screen_2_phone_point1:after{
        left:229px;
    }

/*導航條動畫樣式*/
    .header{
        transition: all 1s;
    }
    .header_status_black{
        background: rgba(0,0,0,.5);
        position: fixed;
        top: 0px;
        left: 0px;
        right: 0px;
        z-index: 3;
    }
    .header_status_black .header_nav_item,
    .header_status_black .header_logo{
        color: #fff;
    }
    .header_status_black .header_nav_item_active{
        color:#f01400;
    }
    .header_status_black .header_nav_item:hover{
        transition: all 1s;
        color: red;
    }

/*側導航動畫效果*/
    .outline{
        transform: translate(100%,0);
        transition: all 1s;
    }
    .outline_status_in{
        transform: translate(0,0);    
    }
    .outline_item{
        transition: all 1s;
    }

script.jsjava

// 基本函數封裝
    // 獲取元素
    var getElem = function( selector ){
      return document.querySelector(selector);
    }
    var getAllElem = function( selector ){
      return document.querySelectorAll(selector);
    }
    // 獲取元素的樣式
    var getCls = function ( element ) {
      return element.getAttribute('class');
    }
    // 設置元素的樣式
    var setCls = function( element ,cls){
      return element.setAttribute('class',cls);
    }
    // 爲元素添加樣式
    var addCls = function( element , cls ){
      var baseCls  = getCls(element);
      if( baseCls.indexOf(cls) === -1){
          setCls(element,baseCls+' '+cls); // 注意空格
      }
      return ;
    }
    // 爲元素刪減樣式
    var delCls = function( element , cls){
      var baseCls  = getCls(element);
      if( baseCls.indexOf(cls) > -1){ // 更精確的須要用正則表達式 ,由於這裏只用於切換 _animate_in 因此沒事
          setCls( element,baseCls.split(cls).join(' ').replace(/\s+/g,' ') );
      }
      return ;
    }

// 定義哪些元素擁有動畫
    var animateEles={
        '.screen_1':[
            '.screen_1_heading',
            '.screen_1_phone',
            '.screen_1_shadow'
        ],
        '.screen_2':[
            '.screen_2_title',
            '.screen_2_subtitle',
            '.screen_2_phone',
            '.screen_2_phone_point1',
            '.screen_2_phone_point2',
            '.screen_2_phone_point3'
        ],
        '.screen_3':[
            '.screen_3_title',
            '.screen_3_subtitle',
            '.screen_3_phone',
            '.screen_3_feature'
        ],
        '.screen_4':[
            '.screen_4_heading',
            '.screen_4_subheading',
            '.screen_4_type_item_i_1',
            '.screen_4_type_item_i_2',
            '.screen_4_type_item_i_3',
            '.screen_4_type_item_i_4'
        ],
        '.screen_5':[
            '.screen_5_heading',
            '.screen_5_subheading',
            '.screen_5_bg'
        ]
    };

//給當前屏元素添加初始化樣式
    function setInit(screenEle){
        var screen=document.querySelector(screenEle);//獲取當前屏
        var animateEle=animateEles[screenEle]; // 獲取須要添加動畫的元素

        for(var i=0;i<animateEle.length;i++){
            var ele=document.querySelector(animateEle[i]);
            var baseCls=ele.getAttribute('class');
            var newCls=baseCls+' '+animateEle[i].substr(1)+'_animate_init';
            ele.setAttribute('class',newCls);
        }
    }

//設置全部元素開始動畫
    function startAnimate(screenEle){
        var screen=document.querySelector(screenEle);//獲取當前屏
        var animateEle=animateEles[screenEle]; // 獲取須要添加動畫的元素

        for(var i=0;i<animateEle.length;i++){
            var ele=document.querySelector(animateEle[i]);
            var baseCls=ele.getAttribute('class');
            var newCls=baseCls.replace('_animate_init','_animate_done');
            ele.setAttribute('class',newCls);
        }
    }

//第一步，頁面全部元素初始化
    window.onload = function () {
        for(k in animateEles){
            if(k=='.screen_1'){
                continue;
            }
              setInit(k);
        }
    }

//第二步，滾動到哪裏就播放哪裏
    var navs=getAllElem('.header_nav_item');
    var outlines=getAllElem('.outline_item');
    var navTip=getElem('.header_nav_tip');

    //切換主導航對應樣式
    var switchActive=function(idx){
        for(var i=0;i<navs.length;i++){
            delCls(navs[i],'header_nav_item_active');
            navTip.style.left=0+'px';
        }
        addCls(navs[idx],'header_nav_item_active'); 
        navTip.style.left=(idx*78)+'px';

        for(var i=0;i<outlines.length;i++){
            delCls(outlines[i],'outline_item_active');
        }
        addCls(outlines[idx],'outline_item_active');
    }
    //默認導航0高亮
    switchActive(0);

    window.onscroll=function(){
        var top=document.body.scrollTop||document.documentElement.scrollTop;
        console.log(top);

        //導航條樣式變更
        if( top > 100 ){
            addCls( getElem('.header'),'header_status_black' );
            addCls( getElem('.outline'),'outline_status_in' );
        }else{
            delCls( getElem('.header'),'header_status_black' );
            delCls( getElem('.outline'),'outline_status_in' );
            switchActive(0);
        }

        if(top>1){
            startAnimate('.screen_1');
        }
        if(top>800*1-200){
            startAnimate('.screen_2');
            switchActive(1);
        }
        if(top>800*2-200){
            startAnimate('.screen_3');
            switchActive(2);
        }
        if(top>800*3-200){
            startAnimate('.screen_4');
            switchActive(3);
        }
        if(top>800*4-200){
            startAnimate('.screen_5');
            switchActive(4);
        }
    }

// 第三步，雙向綁定
    // 封裝導航跳轉函數
    var setJump=function(i,lib){
        lib[i].onclick=function(){
            document.body.scrollTop=i*800;
            document.documentElement.scrollTop=i*800;
        }
    }

    // 綁定主導航
    for(var i=0;i<navs.length;i++){
        setJump(i,navs);
    }
    // 綁定側導航
    for(var i=0;i<outlines.length;i++){
        setJump(i,outlines);
    }

//第四步，滑動門特效
    
    var setTip=function(i,lib){
        //鼠標移入
        lib[i].onmouseover=function(){
            navTip.style.left=(i*78)+'px';
        }
        var activeIdx=0;
        //鼠標移出
        lib[i].onmouseout=function(){
            for(var i=0;i<navs.length;i++){
                if(getCls(lib[i]).indexOf('header_nav_item_active')>-1){
                    activeIdx=i;
                    break;
                }
            }
            navTip.style.left=(activeIdx*78)+'px';
        }
    }

    for(var i=0;i<navs.length-1;i++){
        setTip(i,navs);
    }

setTimeout(function(){
    startAnimate('.screen_1');
},200);