本文執行個體講述了JS+CSS實現滑鼠滑過時動態翻滾的導航條效果。分享給大家供大家參考。具體如下：
這是一款滑鼠移至上方時動態翻滾的導航條，注意這裡用了兩個背景圖，請等待網頁載入完成或多重新整理幾次，這個是使用JavaScript實現的，不過代碼好像是從jQuery裡摘出來的，有點像。
運行效果截圖如下：
線上示範地址如下：
http://demo.jb51.net/js/2015/js-css-mouse-over-nav-scroll-style-codes/
具體代碼如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>動態翻滾的導航條</title><style type="text/css">.clear:after{content:"."; display:block; height:0; clear:both; visibility:hidden}.clear{display:inline-block}.clear{display:block}div#nav{height:32px; background:url(images/YL29.jpg) repeat-x}div#nav ul{ width:705px; list-style:none; margin-top: 0; margin-right: auto; margin-bottom: 0; margin-left: 0px;}div#nav ul li{ float:left; height:32px; overflow:hidden; background-image: url(images/YL30.jpg); background-repeat: repeat-y; background-position: right 0; padding-top: 0; padding-right: 1px; padding-bottom: 0; padding-left: 0px; font-family: Arial; font-size: 12px; line-height: 32px; font-weight: bold;}div#nav ul li a{ float:left; height:100%; width: 77px; background:url(images/YL28.jpg) repeat-x; color:#fff; text-decoration:none; padding-top: 0; padding-right: 5px; padding-bottom: 0; padding-left: 5px; text-align:center;}div#nav ul li a.hover{ clear:both; background-position:0 -32px; width: 77px;}div#nav ul li.on a{ background-position:0 -32px;}div#nav ul li.nobg{background:none}/* ]]> */</style></head><body><div id="nav"><ul class="clear"><li><a href="#">雲棲社區</a></li><li><a href="#">網頁特效</a></li><li><a href="#">工具軟體</a></li><li><a href="#">指令碼下載</a></li><li><a href="#">菜單導航</a></li><li><a href="#">層和布局</a></li><li><a href="#">論壇社區</a></li><li><a href="#">廣告聯絡</a></li><li class="nobg"></li></ul></div><script type="text/javascript"> /* <![CDATA[ */function nav(c, config){ this.config = config || {speed: 10, num: 2}; this.container = (typeof(c)=="object") ? c : document.getElementById(c); this.lineHeight = this.container.offsetHeight; this.scrollTimeId = null; var _this = this; this.__construct = function (){ var inner,el,href; inner = _this.container.childNodes[0].innerHTML; href = _this.container.childNodes[0].href; el = document.createElement("a"); el.innerHTML = inner; el.href = href; el.className = 'hover'; _this.container.appendChild(el); _this.container.onmouseover = function (){_this.start()}; _this.container.onmouseout = function (){_this.end()}; }(); this.start = function (){ _this.clear(); _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed); }; this.end = function (){ _this.clear(); _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed); }; this.scrollUp = function (){ var c = _this.container; if(c.scrollTop >= _this.lineHeight){c.scrollTop = _this.lineHeight;return;} c.scrollTop += _this.config.num; _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed); }; this.scrollDown = function (){ var c = _this.container; if(c.scrollTop <= 0){c.scrollTop = 0;return;} c.scrollTop -= _this.config.num; _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed); }; this.clear = function (){clearTimeout(_this.scrollTimeId)};}(function(){ var container = document.getElementById('nav'); var el_li = container.getElementsByTagName('li'); var arr = []; for( var i = 0; i < el_li.length; i++){ if(el_li[i].className == 'on') continue; arr[i] = new nav(el_li[i], {speed: 10, num: 4}); }})();/* ]]> */</script></body></html>
希望本文所述對大家的JavaScript程式設計有所協助。
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
