这是一款JS实现的纵向拉伸变横向拉伸，动感伸缩菜单，紧身排列的CSS菜单，可用在博客等重要的位置部分作菜单，学习JavaScript前端设计的也可以作为参考范例。
运行效果截图如下：
在线演示地址如下：
具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>有弹性的菜单</title> <style> *{ margin:0px; padding:0px;} body { background:#fff;} .naver{list-style-type: none; width:700px; overflow:hidden; margin:100px auto 0;} .naver li{ width:100px; height:50px; overflow:hidden; font-size:16px; text-align:center; cursor: pointer; } .naver li a,.naver li a:hover{display: block;width:100px; height:50px; line-height: 50px; color:#FFF; text-decoration: none; } .co1{ background:#649e37} .co2{ background:#028fbc} </style> <script type="text/javascript"> window.onload = function() { var oUl = document.getElementById("nav"); var aLi = oUl.getElementsByTagName("li"); var i = 0; for (i = 0; i < aLi.length; i++) { aLi[i].timer = null; aLi[i].speed = 0; aLi[i].onmouseover = function() { startMove(this, 250); }; aLi[i].onmouseout = function() { startMove2(this, 100); }; } }; function startMove(obj, iTarget) { if (obj.timer) { clearInterval(obj.timer); } obj.timer = setInterval(function() { doMove(obj, iTarget); }, 30) }; function doMove(obj, iTarget) { obj.speed += 3; if (Math.abs(iTarget - obj.offsetWidth) < 1 && Math.abs(obj.speed) < 1) { clearInterval(obj.timer); obj.timer = null; } else { if (obj.offsetWidth + obj.speed >= iTarget) { obj.speed *= -0.7; obj.style.width = iTarget + "px"; } else { obj.style.width = obj.offsetWidth + obj.speed + "px"; } } }; function startMove2(obj, iTarget) { if (obj.timer) { clearInterval(obj.timer); } obj.timer = setInterval(function() { doMove2(obj, iTarget); }, 30) }; function doMove2(obj, iTarget) { obj.speed -= 3; if (Math.abs(iTarget - obj.offsetWidth) < 1 && Math.abs(obj.speed) < 1) { clearInterval(obj.timer); obj.timer = null; } else { if (obj.offsetWidth + obj.speed <= iTarget) { obj.speed *= -0.7; obj.style.width = iTarget + "px"; } else { obj.style.width = obj.offsetWidth + obj.speed + "px"; } } }; </script> </head> <body> <ul> <li> <a href="#">首页</a> </li> <li> <a href="#">爱好</a> </li> <li> <a href="#">作品</a> </li> <li> <a href="#">联系</a> </li> <li> <a href="#">博客</a> </li> </ul> </body> </html>