固定在网页顶部跟随滚动条滑动而滑动的DIV层
在一个页面放2个悬浮框，悬浮框随页面的上下滚动有上下波动的效果，最终固定在同一位置
体验效果：http://hovertree.com/texiao/jsstudy/1/
代码如下：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>JavScript页面悬浮框- 何问起</title><base target="_blank" /> <style> body { height: 2000px; } #div1 { width: 100px; height: 150px; background: red; position: absolute; right: 0; top:200px; } #div2 { width: 200px; height: 200px; background: green; position: absolute; left: 0; top: 200px; }a{color:white} </style> </head> <body> <div id="div1"><a href="http://hovertree.com">何问起</a> <a href="http://hovertree.com/texiao/">特效</a></div> <div id="div2"><a href="http://hovertree.com/h/bjaf/mbrpxe4o.htm">原文</a> <a href="http://hovertree.com/texiao/jsstudy/1/">效果</a> </div> <div id="hovertree" style="position:fixed;top:100px;left:40%;z-index:99;height:100px;width:100px;background-color:silver"></div> <div>在一个页面放2个悬浮框，悬浮框随页面的上下滚动有上下波动的效果，最终固定在同一位置</div> <script> var h_div1 = document.getElementById('div1'), h_div2 = document.getElementById('div2'); var h_hvttop = 200; window.onscroll = function () { HoverTreeMove(h_div1, h_hvttop) HoverTreeMove(h_div2, h_hvttop) //显示信息 var h_scrollTop = document.documentElement.scrollTop || document.body.scrollTop;//滚动的距离 var h_hovertree = document.getElementById('hovertree'); h_hovertree.innerHTML = h_div1.offsetTop + " hovertree<br /> " + h_scrollTop + "<br />" + h_div1.style.top; }; function HoverTreeMove(obj,top) { var h_scrollTop = document.documentElement.scrollTop || document.body.scrollTop;//滚动的距离 var h_buchang = 20; if (obj.offsetTop < h_scrollTop + top - h_buchang) { obj.style.top = obj.offsetTop + h_buchang + "px"; setTimeout(function () { HoverTreeMove(obj, top); }, 80); } else if (obj.offsetTop > h_scrollTop + top + h_buchang) { obj.style.top = (obj.offsetTop - h_buchang) + "px"; setTimeout(function () { HoverTreeMove(obj, top); }, 80); } else { obj.style.top = h_scrollTop + top + "px"; } } HoverTreeMove(h_div1, 200) HoverTreeMove(h_div2, 200) </script> </body> </html>
