兼容各浏览器的鼠标滚轮事件

    function mouseWheel(){

        if(document.addEventListener){

            document.body.addEventListener(‘mousewheel‘,function(e){
                Detail(e);
                e.stopPropagation();
                e.preventDefalut();
            });

            document.body.addEventListener(‘DOMMouseScroll‘,function(e){
                Detail(e);
                e.stopPropagation();
                e.preventDefault();
            })
        }else{
            document.body.attachEvent(‘onmousewheel‘,function(event){
                Detail(event);
                event.cancelBubble=true;
                event.returnValue=false;
            })
        }

        function Detail(e){
            ((-e.detail || e.wheelDelta)>0)?alert(‘top‘):alert(‘down‘);
        }
    }