锘?/ 椤堕儴婊氬姩鍔犺浇
var scrollFunc = function (e) {
    e = e || window.event;
    var dis = 0;
    if (e.wheelDelta) {
        if (e.wheelDelta > 0) {
            dis = 1;
        } else {
            dis = 0
        }
    } else {
        if (e.detail > 0) {
            dis = 0;
        } else {
            dis = 1
        }
    };
    
    /*var st = document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop;*/
    var st = $(document).scrollTop();
    if (dis == 0) {       
        $('#header').addClass('on');
        $('#wrapper').style.marginTop = '-100px';
    } else {
        if (st > 150) {
            $('#header').addClass('on');            
        } else {
            $('#header').removeClass('on');
            $('#wrapper').style.marginTop = '0';
        }
    };
};
if (window.addEventListener) {
    //闈瀎irefox
    window.addEventListener('mousewheel', scrollFunc);

    //firefox
    window.addEventListener('DOMMouseScroll', scrollFunc);
}


    var fun = function (doc, win) {
        var docEl = doc.documentElement,
            resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
            recalc = function () {
                var clientWidth = docEl.clientWidth;
                if (!clientWidth) return;

                //杩欓噷鏄亣璁惧湪750px瀹藉害璁捐绋跨殑鎯呭喌涓嬶紝1rem = 10px锛
                //鍙互鏍规嵁瀹為檯闇€瑕佷慨鏀
                docEl.style.fontSize = 10 * (clientWidth / 750) + 'px';
            };
        if (!doc.addEventListener) return;
        win.addEventListener(resizeEvt, recalc, false);
        doc.addEventListener('DOMContentLoaded', recalc, false);
    }
    fun(document, window);