页面没有滚动条如何去触发scroll事件

jsvar MouseWheelHandler = function(e) {      e.preventDefault();      e = window.event || e;      //do something here}/*refer to fullpage.jsgithub: https://github.com/alvarotrigo/fullPage.js*/var addMouseWheelHandler = function() {  document.addEventListener("mousewheel", MouseWheelHandler, false);   //IE9, Chrome, Safari, Oper}addMouseWheelHandler();

这是参考fullpage.js写的
简单来说就是添加鼠标滚轮滚动事件