js判断滚轮（防止多次触发）

//防止特定时间内多次触发鼠标滚轮操作

var flag_mouse;

function rst_flag_mouse() {

    flag_mouse = false;

}



var scrollFunc = function(e) {

    e = e || window.event;

    // window.addEventListener ? window.addEventListener("DOMMouseScroll", this.wheel, false) : null;

    if (e.wheelDelta) {

        //第一步：先判断浏览器IE，谷歌滑轮事件

        if (e.wheelDelta > 50) {

            //当滑轮向上滚动时

            if (flag_mouse == false) {

                flag_mouse = true;

                setTimeout(function() {

                    rst_flag_mouse();

                }, 500);

                // console.log("滑轮向上滚动");

                swiper_outside.slidePrev();



            } else {

                // console.log("滑轮向上滚动");

            }

        }

        if (e.wheelDelta < 50) {

            if (flag_mouse == false) {

                flag_mouse = true;

                setTimeout(function() {

                    rst_flag_mouse();

                }, 500);

                //当滑轮向下滚动时

                // console.log("滑轮向下滚动");

                swiper_outside.slideNext();

            }

        }

    } else if (e.detail) {

        //Firefox滑轮事件

        if (e.detail < 0) {



            if (flag_mouse == false) {

                flag_mouse = true;

                setTimeout(function() {

                    rst_flag_mouse();

                }, 500);

                //当滑轮向上滚动时

                // console.log("滑轮向上滚动");

                swiper_outside.slidePrev();

            }

        }

        if (e.detail > 0) {



            if (flag_mouse == false) {

                flag_mouse = true;

                setTimeout(function() {

                    rst_flag_mouse();

                }, 500);

                //当滑轮向下滚动时

                // console.log("滑轮向下滚动");

                swiper_outside.slideNext();

            }

        }

    }

}; //给页面绑定滑轮滚动事件

if (document.addEventListener) {

    //firefox

    document.addEventListener("DOMMouseScroll", scrollFunc, false);

} //滚动滑轮触发scrollFunc方法 //ie 谷歌

window.onmousewheel = document.onmousewheel = scrollFunc;