JS实现带圆弧背景渐变效果的导航菜单代码

2019-11-20 11:28:27

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本文实例讲述了JS实现带圆弧背景渐变效果的导航菜单代码。分享给大家供大家参考。具体如下：

这是一款效果个性的JS+CSS导航菜单，鼠标经过时出现有趣弧形背景，实际上，这里用CSS调用了背景，用JavaScript控制了背景的移动，用jQuery实现过类似的功能，整体感觉很不错。

运行效果截图如下：

在线演示地址如下：

http://demo.VeVB.COm/js/2015/js-css-cicle-cha-nav-menu-demo/

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><title>圆弧背景的导航菜单</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="#">欢迎光临</a></li> <li><a href="#">最新更新</a></li> <li><a href="#">下载排行</a></li> <li><a href="#">网页特效</a></li> <li><a href="#">广告联系</a></li> </ul></div></body></html>

希望本文所述对大家的JavaScript程序设计有所帮助。

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