一个控制背景的显示公共方法 包括对ie的兼容性

var ww;
var wh;
var ieVer=IEVersion();
var chVer=ChromeVersion();
var browserType=browser();
var expandNav=false;

//让IE8支持forEach
if ( !Array.prototype.forEach ) {
    Array.prototype.forEach = function forEach( callback, thisArg ) {
        var T, k;
        if ( this == null ) {
            throw new TypeError( "this is null or not defined" );
        }
        var O = Object(this);
        var len = O.length >>> 0;
        if ( typeof callback !== "function" ) {
            throw new TypeError( callback + " is not a function" );
        }
        if ( arguments.length > 1 ) {
            T = thisArg;
        }
        k = 0;
        while( k < len ) {
            var kValue;
            if ( k in O ) {
                kValue = O[ k ];
                callback.call( T, kValue, k, O );
            }
            k++;
        }
    };
}

function resize(first){
    ww=$(window).width();
    wh=$(window).height();
    var $body=$(‘body‘);

    $body.css({
        ‘height‘:wh+‘px‘
    });
    var headerHeight=(ww>720)?60:46;
    $(‘#container‘).css(‘height‘,(($body.height()-headerHeight)+‘px‘));
    $(‘#bg‘).css(‘height‘,(($body.height()-headerHeight)+‘px‘));


    var $nav=$(‘nav‘);
    var $sm=$(‘.sub-menu-div‘);
    if(ww<=720){
        $nav.css(‘height‘,Math.max(($body.height()-headerHeight),355)+‘px‘);

        $sm.stop().show();
        $nav.stop().hide();
    }else{
        $sm.stop().hide();
        $nav.stop().show();
    }

    resizeHook(first);
}

$(function(){
    resize(true);
    $(window).resize(function() {
        resize();
        setTimeout(resize,500);
    }).load(function(){
        resize();
        setTimeout(resize,500);
    });

    $(‘.has-sub-menu‘).mouseover(function () {
        if(ww>720) {
            var $sm = $(this).children(‘.sub-menu-div‘);
            $sm.stop().fadeIn();
        }
    }).mouseleave(function () {
        if(ww>720) {
            var $sm = $(this).children(‘.sub-menu-div‘);
            $sm.stop().fadeOut();
        }
    });

    $(‘.nav-button‘).click(function(){
        if(!expandNav){
            $(‘nav‘).stop().slideDown();
            if(ltIE9()){
                var $img=$(‘#right_button>img‘);
                $img.fadeOut(300,null,function(){
                    $img.attr(‘src‘,getImgUrl(‘hanburger-button-close‘)).fadeIn(300);
                });
            }else{
                $(‘.menu-button‘).addClass(‘menuhover‘);
            }
        }else{
            $(‘nav‘).stop().slideUp();
            if(ltIE9()){
                var $img=$(‘#right_button>img‘);
                $img.fadeOut(300,null,function(){
                    $img.attr(‘src‘,getImgUrl(‘hanburger-button‘)).fadeIn(300);
                });
            }else {
                $(‘.menu-button‘).removeClass(‘menuhover‘);
            }
        }
        expandNav=!expandNav;
    });

    if(noSVG()){
        $(‘#logo‘).attr(‘src‘,getImgUrl(‘header_logo‘));
        $(‘#logo_description‘).attr(‘src‘,getImgUrl(‘header_description‘));
    }

    if(ltIE9()){
        $(‘#right_button‘).html(‘<img style="display: block" src="‘+getImgUrl(‘hanburger-button‘)+‘" border=0 ondragstart="return false;"/>‘);
    }

    if(ltIE9() || browserType==‘Safari‘){
        var fontArr=[‘xi‘,‘zhengcu‘,‘putong‘];
        fontArr.forEach(function(e){
            $(‘.font-‘+e).removeClass(‘font-‘+e).addClass(‘font-native-‘+e);
        });
    }
});

function resizeHook(first){}

//判断浏览器版本是否低于IE9
function ltIE9(){
    return ieVer && ieVer<9;
}

//查询IE浏览器版本
function IEVersion(userAgent){
    var UA =  userAgent || navigator.userAgent;
    if(/msie/i.test(UA)){
        return UA.match(/msie (\d+\.\d+)/i)[1]*1;
    }else if(~UA.toLowerCase().indexOf(‘trident‘) && ~UA.indexOf(‘rv‘)){
        return UA.match(/rv:(\d+\.\d+)/)[1]*1;
    }
    return false;
}

//查询Chrome浏览器大版本
function ChromeVersion(){
    if(browser()!=‘Chrome‘){
        return false;
    }

    var agent = navigator.userAgent.toLowerCase() ;
    var regStr_chrome = /chrome\/[\d.]+/gi ;
    var info=(agent.match(regStr_chrome)+"").replace(/[^0-9.]/ig,"");
    return /^([0-9]+)\./.exec(info)[1]*1;
}

//判断浏览器种类
function browser(){
    if (!!window.ActiveXObject || "ActiveXObject" in window)
        return "IE";//判断是否IE浏览器
    var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
    var isOpera = userAgent.indexOf("Opera") > -1;
    if (isOpera) {
        return "Opera"
    } //判断是否Opera浏览器
    if (userAgent.indexOf("Edge") > -1) {
        return "Edge";
    } //判断是否Edge浏览器
    if (userAgent.indexOf("Firefox") > -1) {
        return "FF";
    } //判断是否Firefox浏览器
    if (userAgent.indexOf("Chrome") > -1){
        return "Chrome";
    }
    if (userAgent.indexOf("Safari") > -1) {
        if(userAgent.indexOf("Windows") > -1){
            return "Safari for Win";
        }
        return "Safari";
    } //判断是否Safari浏览器
    if (userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera) {
        return "IE";
    } //判断是否IE浏览器
}

//判断是否不支持SVG
function noSVG(){
    return ltIE9() || browserType==‘Safari for Win‘ || (chVer && chVer<31);
}

function getImgUrl(token) {
    var urls = {
        "hanburger-button-close": "img/hanburger-button-close.png",
        "hanburger-button": "img/hanburger-button.png",
        "header_logo": "img/header_logo.png",
        "header_description": "img/header_description.png",
    };
    return $(‘.at-level-1‘).length>0 ? urls[token] : ‘../‘ + urls[token];
}

function resizeHook(){
    if(ww<=720){
        var $bf=$(‘#bg-float‘);
        $bf.css(‘width‘,ww+‘px‘);
        var bf_height=ww/720*534;
        if(wh>$bf.offset().top+bf_height){
            $bf.css(‘padding-top‘,wh-$bf.offset().top-bf_height+‘px‘);
        }
    }
}

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no">
    <meta content="always" name="referrer">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <title>关于凯京 - 凯京集团</title>
    <link rel="stylesheet" href="../css/public.css">
    <link rel="stylesheet" href="../css/hamburger.css">
    <link rel="stylesheet" href="../css/about-yudian.css">
    <!--[if lt IE 9]>
    <script src="../js/respond.min.js"></script>
    <script src="../js/html5shiv.min.js"></script>
    <![endif]-->
    <script src="../js/prefixfree.min.js"></script>
    <script src="../js/jquery.min.js"></script>
</head>
<body>
<header class="limit-parent-header at-level-2">
    <div class="limit-header">
        <a href="../index.html"><img id="logo" src="../img/header_logo.svg" border=0 ondragstart="return false;"></a>
        <img id="logo_description" src="../img/header_description.svg" ondragstart="return false;">
        <div id="right_button" class="nav-button">
            <section class="mod model-1">
                <div class="menu-button">
                    <div class="bar"></div>
                    <div class="bar"></div>
                </div>
            </section>
        </div>
        <nav class="font-xi">
            <ul class="menu">
                <li class="menu-item"><a href="../index.html">首页</a></li>
                <li class="menu-item active-li"><a class="active-a" href="about-yudian.html">关于凯京</a></li>
                <li class="menu-item has-sub-menu"><a href="group-business.html">集团板块</a>
                    <div class="sub-menu-div">
                        <div class="sub-menu-arrow"></div>
                        <ul class="sub-menu">
                            <li class="sub-menu-item"><a href="chuangpu.html">商业保理</a></li>
                            <li class="sub-menu-item has-top-line"><a href="kaijing.html">融资租赁</a></li>
                            <li class="sub-menu-item has-top-line"><a href="luchang.html">信息科技</a></li>
                        </ul>
                    </div>
                </li>
                <li class="menu-item last-menu-item"><a href="contact.html">联系我们</a></li>
                <li class="menu-item new-menu-item"><a href="http://cloud.keking.cn" target="_blank">商户登录</a></li>
            </ul>
        </nav>
        <div class="clearer"></div>
    </div>
</header>
<div id="bg"></div>
<div id="container" class="limit-parent-article">
    <article class="limit-article">
        <p class="title font-zhengcu">凯京集团是什么？</p>
        <div class="content font-putong">
            <p>上海凯京信达科技集团有限公司（“凯京集团”），2015年成立于上海陆家嘴，专注为中小微企业和个人提供各类场景下的信贷服务，产品包括商业保理业务、融资租赁业务、供应链金融、大数据征信等。</p>
            <p>公司2015年获得知名投资机构数千万元人民币天使轮投资，2016年2月获得<b class="font-zhengcu">红杉资本</b>领投的1亿元人民币A轮投资，2016年12月获得由<b class="font-zhengcu">中航信托</b>领投、<b class="font-zhengcu">红杉资本</b>、<b class="font-zhengcu">复朴资本</b>跟投的2亿人民币B轮融资。</p>
            <p>我们的使命：数据重构物流</p>
            <p>我们的愿景：最具价值的数据科技企业</p>
        </div>
    </article>
    <img id="bg-float" src="../img/about_yudian_bg_float_mobile.png" ondragstart="return false;">
</div>
<script src="../js/public.js"></script>
<script src="../js/about-yudian.js"></script>
<!--[if lt IE 9]>
<script src="../js/rem.min.js"></script>
<![endif]-->
</body>
</html>

about-yudian.css


        

        /*# sourceURL=../css/about-yudian.css */
/*@ sourceURL=../css/about-yudian.css */
#bg{
    background-image:url("http://www.keking.cn/css/../img/about_yudian_bg.jpg");
    background-position: 50% 100%;
    background-size: cover;
    -ms-behavior: url("../js/backgroundsize.min.htc");
}

#bg-float{
    display: none;
}

.content{
    font-size: 1rem;
    color: #444444;
    margin-top: 60px;
    line-height: 2.0rem;
    font-weight: 400;
    letter-spacing: 0.05rem;
    text-align: justify;
}

.content>p{
    margin: 0.5rem 0;
}

b{
    font-size: 1.2rem;
}

@media (max-height: 750px) and (min-width: 721px) {
    #bg {
        background-position: 50% 70%;
    }
}

@media (max-width: 720px) {
    #bg {
        background-image: url("http://www.keking.cn/css/../img/about_yudian_bg_mobile.jpg");
        background-position: 50% 100%;
        background-size: cover;
        -ms-behavior: url("../js/backgroundsize.min.htc");
    }

    #bg-float{
        display: block;
        margin-left: -40px;
    }

    .content{
        font-size: 1rem;
        color: #444444;
        margin-top: 36px;
        line-height: 1.8rem;
    }
}

hamburgur.css


            /*# sourceURL=../css/about-yudian.css */
/*@ sourceURL=../css/about-yudian.css */
#bg{
    background-image:url("http://www.keking.cn/css/../img/about_yudian_bg.jpg");
    background-position: 50% 100%;
    background-size: cover;
    -ms-behavior: url("../js/backgroundsize.min.htc");
}

#bg-float{
    display: none;
}

.content{
    font-size: 1rem;
    color: #444444;
    margin-top: 60px;
    line-height: 2.0rem;
    font-weight: 400;
    letter-spacing: 0.05rem;
    text-align: justify;
}

.content>p{
    margin: 0.5rem 0;
}

b{
    font-size: 1.2rem;
}

@media (max-height: 750px) and (min-width: 721px) {
    #bg {
        background-position: 50% 70%;
    }
}

@media (max-width: 720px) {
    #bg {
        background-image: url("http://www.keking.cn/css/../img/about_yudian_bg_mobile.jpg");
        background-position: 50% 100%;
        background-size: cover;
        -ms-behavior: url("../js/backgroundsize.min.htc");
    }

    #bg-float{
        display: block;
        margin-left: -40px;
    }

    .content{
        font-size: 1rem;
        color: #444444;
        margin-top: 36px;
        line-height: 1.8rem;
    }
}

public.css

        /*# sourceURL=../css/public.css */
/*@ sourceURL=../css/public.css */
*{
    transition: 0.3s;
}

html{
    font-family: ‘PingFang SC‘,‘Helvetica Neue‘,Helvetica,‘Hiragino Sans GB‘,STHeitiSC-Light,‘Microsoft YaHei‘,Arial,sans-serif;
    font-size: 16px;
}

body {
    margin: 0;
    overflow: hidden;
}

a{
    text-decoration: none;
}

header {
    height: 60px;
    background-color: #283e56;
    user-select: none;
    z-index: 100;
}

.font-xi, .font-native-xi{
    font-weight: 300;
}

.font-zhengcu, .font-native-zhengcu{
    font-weight: 900;
}

.limit-header{
    display: inline-block;
    position: relative;
    text-align: left;
    transition: none;
    width: 1000px;
}

.limit-article{
    display: inline-block;
    position: relative;
    text-align: left;
    width: 900px;
    transition: none;
}

.limit-parent-header{
    text-align: center;
    transition: none;
}

.limit-parent-article{
    text-align: center;
    transition: none;
}

#logo{
    margin-top: 18px;
    height: 24px;
    transition: none;
}

#logo_description{
    position: relative;
    top: -4px;
    margin-left: 10px;
    height: 12px;
    transition: none;
}

.clearer{
    clear: both;
}

#right_button {
    display: none;
}

header nav{
    position: absolute;
    top: 0;
    right: 0;
}

.menu,.sub-menu{
    padding: 0;
    margin: 0;
}

.menu-item{
    position: relative;
    float: left;
    background-color: #283e56;
    list-style: none;
    text-align: center;
    overflow: visible;
}

.menu-item>a{
    display: inline-block;
    width: 90px;
    height: 60px;
    line-height: 60px;
    color: white;
    text-decoration: none;
    font-size: 0.8rem;
}

.menu-item>a:hover,.menu-item>a.active-a{
    color: rgba(255,255,255,0.7);
}

.menu-item.active-li{
    background-color: #1A2B44;
    color: rgba(255,255,255,0.7);
}

.sub-menu-div{
    display: none;
    position: absolute;
    z-index: 100;
    width: 135px;
    left: -22.5px;
    transition: none;
}

.sub-menu-arrow{
    width:0;
    height:0;
    border-width:8px;
    border-style:dashed dashed solid;
    border-color:transparent transparent #283e56;
    font-size:0;
    line-height:0;
    margin: 0 auto;
}

.sub-menu-item{
    list-style: none;
    background-color: #283e56;
}

.sub-menu-item>a{
    display: inline-block;
    line-height: 30px;
    color: white;
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 300;
    width: 100%;
    height: 30px;
}

.sub-menu-item>a:hover{
    color: rgba(255,255,255,0.7);
}

.has-top-line{
    border-top: 0.5px solid #607284;
}

#bg{
    position: absolute;
    width: 100%;
    top:60px;
    left:0;
    transition: none;
    z-index: -999;
    opacity: 0.9;
}

#container{
    margin: 0;
    overflow-x: hidden;
    overflow-y: auto;
    position: relative;
    transition: none;
}

.title{
    font-size: 2.2rem;
    font-weight: bold;
    text-align: center;
    color: #555555;
    margin-top: 90px;
    letter-spacing: 0.1rem;
}

.footer-holder{
    height: 40px;
}

/*@media (max-width: 1000px) and (min-width: 801px) {*/
    /*.limit-header{*/
        /*width: 700px;*/
    /*}*/

    /*.limit-article{*/
        /*width: 700px;*/
    /*}*/
/*}*/

@media (max-width:1024px) and (min-width: 721px) {
    .limit-header{
        width: 700px;
    }
    #logo{
        width:230px;
    }

    .limit-article{
        width: 700px;
    }
}

@media (max-height: 750px) and (min-width: 721px) {
    .title{
        margin-top: 60px;
    }
}

@media (max-width: 720px) {
    .limit-header{
        position: relative;
        text-align: left;
        display: block;
        width: auto;
    }

    .limit-article{
        display: inline-block;
        position: relative;
        text-align: left;
        max-width: 900px;
        width: auto;
    }

    .limit-parent-header{
        padding:0 15px;
        text-align: center;
    }

    .limit-parent-article{
        padding:0 40px;
        text-align: center;
    }

    header {
        height: 46px;
    }

    #logo{
        margin-top: 15px;
        height: 16px;
    }

    #logo_description{
        position: relative;
        top: -3px;
        margin-left: 6px;
        height: 9px;
    }

    #right_button {
        display: block;
        float: right;
        width: 28px;
        height: 28px;
        margin-top: 9px;
        cursor: pointer;
    }

    header nav{
        position: absolute;
        top: 46px;
        left: 0;
        z-index: 100;
        margin: 0 -15px;
        background-color: #283e56;
        display: none;
        transition: none;
        padding-top: 20px;
    }

    .menu{
        margin: 0 40px;
    }

    .sub-menu{
        margin: 0;
    }

    .menu-item{
        float: none;
        position: relative;
        background-color: #283e56;
        text-align: left;
        font-weight: bold;
    }

    .menu-item>a{
        display: block;
        width: 100%;
        height: 45px;
        line-height: 45px;
        border-bottom: 0.5px solid #a9b2bb;
    }

    .menu-item>a:hover,.menu-item>a.active-a,.sub-menu-item>a.active-a{
        color: rgba(255,255,255,0.7);
    }

    .menu-item.active-li{
        background-color: #283e56;
        color: rgba(255,255,255,0.7);
    }

    .sub-menu-div{
        display: block;
        position: relative;
        width: 100%;
        left: 0;
    }

    .sub-menu-arrow{
        display: none;
    }

    .sub-menu-item{
        list-style: none;
        background-color: #283e56;
    }

    .sub-menu-item>a{
        display: block;
        line-height: 45px;
        font-size: 0.8rem;
        height: 45px;
        border-bottom: 0.5px solid #a9b2bb;
        padding-left: 60px;
    }

    .sub-menu-item>a:hover{
        color: rgba(255,255,255,0.7);
    }

    .has-top-line{
        border-top: none;
    }

    .last-menu-item a{
        border-bottom: 1.5px solid white;
    }
    .new-menu-item{
        display: none;
    }

    #bg{
        top:46px;
    }

    .title{
        font-size: 1.6rem;
        font-weight: bold;
        text-align: center;
        color: #333333;
        margin-top: 40px;
    }
}
#logo_description{
    display: none;
}

插件        

    prefiexfree.min






/**
 * StyleFix 1.0.3 & PrefixFree 1.0.7
 * @author Lea Verou
 * MIT license
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about yudian.js





function resizeHook(){
    if(ww<=720){
        var $bf=$(‘#bg-float‘);
        $bf.css(‘width‘,ww+‘px‘);
        var bf_height=ww/720*534;
        if(wh>$bf.offset().top+bf_height){
            $bf.css(‘padding-top‘,wh-$bf.offset().top-bf_height+‘px‘);
        }
    }
}