本文實(shí)例講述了JS實(shí)現(xiàn)帶圓弧背景漸變效果的導(dǎo)航菜單代碼。分享給大家供大家參考。具體如下：
這是一款效果個(gè)性的JS+CSS導(dǎo)航菜單，鼠標(biāo)經(jīng)過(guò)時(shí)出現(xiàn)有趣弧形背景，實(shí)際上，這里用CSS調(diào)用了背景，用JavaScript控制了背景的移動(dòng)，用jQuery實(shí)現(xiàn)過(guò)類(lèi)似的功能，整體感覺(jué)很不錯(cuò)。
運(yùn)行效果截圖如下：
在線(xiàn)演示地址如下：
http://demo.VeVB.COm/js/2015/js-css-cicle-cha-nav-menu-demo/
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 xmlns="http://www.w3.org/1999/xhtml"><head><title>圓弧背景的導(dǎo)航菜單</title><meta http-equiv="content-type" content="text/html;charset=gb2312"><style type="text/css">*{margin:0px;padding:0px;font-size:12px;}.div_menu{ position:absolute;left:100px;top:100px;}.ul_menu{list-style:none;}.ul_menu li{float:left;margin-left:1px;border:1px solid #33CCCC;display:block;padding:5px 3px;background:url(images/menu_bg.gif) repeat-x 0px -80px;padding:2px 12px;}.ul_menu li a{height:40px;width:auto;color:#ffffff;font-size:20px;font-weight:600;text-decoration:none;}</style><script type="text/javascript">var isIE = (document.all)?true:false;var $ID = function(id){ return "string"==typeof id?document.getElementById(id):id;}var Class = { create:function(){ return function(){ this.initilize.apply(this,arguments); } }}var Extend = function(destination, source){ for(var property in source){ destination[property] = source[property]; }}var Bind = function(object,fun){ var args = Array.prototype.slice.call(arguments).slice(2); return function(){ return fun.apply(object,args); }}var BindAsEventListener = function(object,fun){ var args = Array.prototype.slice.call(arguments).slice(2); return function(event){ return fun.apply(object,[event||window.event].concat(args)); }}function addEventHandler(oTarget, sEventType, fnHandler) { if (oTarget.addEventListener) { oTarget.addEventListener(sEventType, fnHandler, false); } else if (oTarget.attachEvent) { oTarget.attachEvent("on" + sEventType, fnHandler); } else { oTarget["on" + sEventType] = fnHandler; }};function removeEventHandler(oTarget, sEventType, fnHandler) { if (oTarget.removeEventListener) { oTarget.removeEventListener(sEventType, fnHandler, false); } else if (oTarget.detachEvent) { oTarget.detachEvent("on" + sEventType, fnHandler); } else { oTarget["on" + sEventType] = null; }};</script><script type="text/javascript">var MyMenu = Class.create();MyMenu.prototype = { initilize:function(ul){ this.lis = ul.getElementsByTagName("li"); for(var i=0;i<this.lis.length;i++){ new BgChange(this.lis[i]); } }}var BgChange = Class.create();BgChange.prototype = { initilize:function(li){ this.li = li; this._fnMouseOver = Bind(this,this.MouseOver); this._fnMouseOut = Bind(this,this.MouseOut); addEventHandler(this.li,"mouseover",this._fnMouseOver); addEventHandler(this.li,"mouseout",this._fnMouseOut); this.timer = null; this.i = -80; }, MouseOver:function(){ this.Stop(); this.i+=2; if(this.i>=0){ window.clearTimeout(this.timer); this.i = 0; }else{ this.ShowBg(); this.timer = window.setTimeout(this._fnMouseOver,10); } }, MouseOut:function(){ this.Stop(); this.i-=2; if(this.i<=-80){ window.clearTimeout(this.timer); this.i = -80; }else{ this.ShowBg(); this.timer = window.setTimeout(this._fnMouseOut,10); } }, ShowBg:function(){ this.li.style.backgroundPosition = "0px " + this.i + "px"; }, Stop:function(){ if(this.timer){ window.clearTimeout(this.timer); } }}onload = function(){ new MyMenu($ID("ul_menu"));}</script></head><body><div class="div_menu"> <ul class="ul_menu" id="ul_menu"> <li><a href="#">歡迎光臨</a></li> <li><a href="#">最新更新</a></li> <li><a href="#">下載排行</a></li> <li><a href="#">網(wǎng)頁(yè)特效</a></li> <li><a href="#">廣告聯(lián)系</a></li> </ul></div></body></html>希望本文所述對(duì)大家的JavaScript程序設(shè)計(jì)有所幫助。
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