$(function() {    // 设置每次滚动长度，单位 px    var scroll_width = 100;    var scroll_events = "mousewheel DOMMouseScroll MozMousePixelScroll";    $("body").on(scroll_events, function(e) {        var delta = e.originalEvent.wheelDelta        console.log(delta);        var detail= e.originalEvent.detail;        // 滑轮向下滚动，滚动条向右移动，scrollleft+        if(!detail){            this.scrollLeft-= (delta);        }else{            if(detail>0){                $("html").scrollLeft($("html").scrollLeft() + scroll_width);            }            // 滑轮向上滚动，滚动条向座移动，scrollleft-            else{                $("html").scrollLeft($("html").scrollLeft() - scroll_width);            }        }    });});