//rem自动计算

(function (designWidth, maxWidth, viewWidth) {

    var doc = document,

        win = window,

        docEl = doc.documentElement,

        remStyle = document.createElement("style"),

        tid;

    function refreshRem() {

        var width = docEl.getBoundingClientRect().width;

        maxWidth = maxWidth || 540;

        width > maxWidth && (width = maxWidth);

        var rem = width * 100 / designWidth;

        if (viewWidth == null || viewWidth < maxWidth) {

            remStyle.innerHTML = 'html{font-size:' + rem + 'px;}';

        } else {

            remStyle.innerHTML = 'html{font-size:' + rem + 'px; max-width:' + viewWidth + 'px; margin: auto}';

        }

    }

    if (docEl.firstElementChild) {

        docEl.firstElementChild.appendChild(remStyle);

    } else {

        var wrap = doc.createElement("div");

        wrap.appendChild(remStyle);

        doc.write(wrap.innerHTML);

        wrap = null;

    }

    refreshRem();

    win.addEventListener("resize", function () {

        clearTimeout(tid);

        tid = setTimeout(refreshRem, 300);

    }, false);

    win.addEventListener("pageshow", function (e) {

        if (e.persisted) {

            clearTimeout(tid);

            tid = setTimeout(refreshRem, 300);

        }

    }, false);

    if (doc.readyState === "complete") {

        doc.body.style.fontSize = "16px";

    } else {

        doc.addEventListener("DOMContentLoaded", function (e) {

            doc.body.style.fontSize = "16px";

        }, false);

    }

})(750, 750);

//修改页面title

var pageTitle=document.getElementsByTagName("title")[0].innerHTML;

if(location.href.indexOf("index.html")>-1 || location.href.indexOf("html")==-1){

    document.getElementsByTagName("title")[0].innerHTML="一汽-大众商城-一汽-大众官方电商平台-只为简单汽车生活";

}

//微信JSSDK

document.write('<script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.3.2.js"></script>');

//rem自动计算

(function(doc, win) {

    var docEl = doc.documentElement,

        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',

        recalc = function() {

            var clientWidth = docEl.clientWidth;

            if (!clientWidth) return;

            docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';

        };

    if (!doc.addEventListener) return;

    win.addEventListener(resizeEvt, recalc, false);

    doc.addEventListener('DOMContentLoaded', recalc, false);

})(document, window);

//rem自动计算

(function(doc, win) {

    var docEl = doc.documentElement,

        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',

        recalc = function() {

            var clientWidth = docEl.clientWidth;

            if (!clientWidth) return;

            docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';

        };

    if (!doc.addEventListener) return;

    win.addEventListener(resizeEvt, recalc, false);

    doc.addEventListener('DOMContentLoaded', recalc, false);

})(document, window);