判断当前浏览器是不是火狐和禁止鼠标滚轮事件

var firefox = navigator.userAgent.indexOf('Firefox') != -1;alert(firefox)

firefox ? window.addEventListener('DOMMouseScroll', MouseWheel, false) :      (window.onmousewheel = MouseWheel);//禁止鼠标滚轮事件function MouseWheel(e) {    e = e || window.event;      if (e.stopPropagation) e.stopPropagation();    else e.cancelBubble = true;          if (e.preventDefault) e.preventDefault();    else e.returnValue = false;    }