JS,CSS,碰撞缓冲效果,竖向,导航条本文实例讲述了JS+CSS实现带有碰撞缓冲效果的竖向导航条代码。分享给大家供大家参考。具体如下： 这是一款碰撞缓冲效果的导航条，JavaScript妙味课堂奉献给大家的作品，很不错的竖向菜单，希望大家喜欢。所用技术是JS和CSS。 运行效果截图如下： 
在线演示地址如下： http://demo.wanshiok.com/js/2015/js-css-pzxg-r-nav-style-codes/ 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"><title>碰撞缓冲效果的导航条</title><style type="text/css">* { padding: 0; margin: 0; }li { list-style: none; }body { background: #fff; }ul { width: 202px; margin: 40px auto 0; position: relative; }li { width: 200px; height: 30px; line-height: 30px; padding-left: 10px; border: 1px solid #ccc; border-left: 3px solid #666; font-size: 14px; color: #333; margin-bottom: 5px; position: relative; z-index: 2; }a { color: #333; text-decoration: none; }.active { font-weight: bold; background: #fff0f0; }#bar { width: 10px; padding-left: 0; background: #cc6699; border: 1px solid #cc6699; position: absolute; top: 0; left: -14px; z-index: 3; }</style><script>var obj = null;var aLis = null;var oBar = null;var iTime = null;var iSpeed = 0;var iAcc = 3;var onOff = 0;var iPrev = 0;var iNext = 0;function goTime(){ for(var i = 0; i < aLis.length; i+=1) { if(aLis[i] === this) { var iTarget = (aLis[0].offsetHeight + 5) * i; iNext = i; onOff = iNext - iPrev; if(iTime) { clearInterval(iTime); } if(onOff>=0) { iTime = setInterval("elasticity("+ iTarget +")",35); } else { iTime = setInterval("postpone("+ iTarget +")",35); } iPrev = iNext; } aLis[i].className=""; this.className="active"; }}function elasticity(target){ var top = oBar.offsetTop; iSpeed+=iAcc; top += iSpeed; if(top >= target) { iSpeed*=-0.7; if(Math.abs(iSpeed)<=iAcc) { clearInterval(iTime); iTime=null; } top=target; } oBar.style.top = top + "px";}function postpone(target){ if(oBar.offsetTop===target) { clearInterval(iTime); iTime=null; } else { iSpeed = (target - oBar.offsetTop)/4; oBar.style.top = oBar.offsetTop + iSpeed + "px"; }}window.onload = function(){ obj = document.getElementById("nav"); aLis = obj.getElementsByTagName("li"); oBar = document.getElementById("bar"); for(var i = 0; i < aLis.length; i+=1) { if(aLis[i].id!="bar") { aLis[i].onmouseover = goTime; } }};</script></head><body><ul id="nav"> <li class="active"><a href="#">首页</a></li> <li><a href="#">wanshiok.com</a></li> <li><a href="#">妙味课程</a></li> <li><a href="#">联系方式</a></li> <li id="bar"></ul></body></html>希望本文所述对大家的JavaScript程序设计有所帮助。
JS,CSS,碰撞缓冲效果,竖向,导航条
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