Question

如何用js实现鼠标向上滚动时浮动导航

Answer 1

<script> var scrollFunc = function (e) { var direct = 0; 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 alert("滑轮向上滚动"); } if (e.wheelDelta < 0) { //当滑轮向下滚动时 alert("滑轮向下滚动"); } } else if (e.detail) { //Firefox滑轮事件 if (e.detail> 0) { //当滑轮向上滚动时 alert("滑轮向上滚动"); } if (e.detail< 0) { //当滑轮向下滚动时 alert("滑轮向下滚动"); } } ScrollText(direct); } //给页面绑定滑轮滚动事件 if (document.addEventListener) { document.addEventListener('DOMMouseScroll', scrollFunc, false); } //滚动滑轮触发scrollFunc方法 window.onmousewheel = document.onmousewheel = scrollFunc; </script>