var scrollFunc = function (e) {
e = e || window.event;
if (e.wheelDelta) { //判断浏览器IE,谷歌滑轮事件
if (e.wheelDelta > 0) { //当滑轮向上滚动时
var userops=document.getElementsByClassName("user-ops")[0];
userops.style.bottom=15+'px';
}
if (e.wheelDelta < 0) {
var userops=document.getElementsByClassName("user-ops")[0];
userops.style.bottom=-59+'px';
}
} else if (e.detail) { //Firefox滑轮事件
if (e.detail> 0) { //当滑轮向上滚动时
var userops=document.getElementsByClassName("user-ops")[0];
userops.style.bottom=15+'px';
}
if (e.detail< 0) { //当滑轮向下滚动时
var userops=document.getElementsByClassName("user-ops")[0];
userops.style.bottom=-59+'px';
}
}
}
//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;