谁在用这些导航
google是个大公司,全世界都有google的脚印,韩国的google动画效果非常不错,蓝色理想论坛里已经有人挖过来了,可惜js写的太多了,那自己写一个吧?好,就这么干!
原理
小时候,总喜欢看动画片吧,动画片是怎样实现的呢?记得妈妈说是一张画一张画切换过去(啊?那一部葫芦兄弟要画多少副画啊? -_-! ),其实我们现在做的也是这样,用一个图片,这个图片里有很多个小图,来显示动画轨迹.按时间来移动图片,那图片不是会动了啊?(不知道,表达清楚了没…语文很重要啊!!)
准备
我们需要一张图片,一个大脑,一张会笑的脸(不笑效果就出不来了….)!!下面是我准备的图片(ps水平有限^_^)…
代码
我们看到上面的图片,想象下,它动起来是多么的优美啊…
css
.Gnb_btn_div{ width:90px; height:75px; overflow:hidden; display:block; position:absolute;}
.Gnb_btn_img{ width:100%; height:525px; display:block; overflow:hidden; text-indent:-500px;}#gnb_btn_01 .Gnb_btn_img { background-image:url(/u/info_img/2007-12/02/friend.gif)}
javascript:
<script type="text/javascript">// <![CDATA[function GNB(_7c){ //初始化一些参数 this.iImgNum=7; //小图片个数 this.iImgHeight=75; //小图片高度 this.iOverSpeed=50; //鼠标经过时候切换的时间 this.iOutSpeed=50; //鼠标离开时候切换的时间 this.eventObj=_7c; //取得图片对象
this.MouseOverFlag=false; this.imageIndex=0; if(this.eventObj==null){return;} this.eventObj.parentClass=this;this.eventAssign();}
GNB.prototype.eventAssign=function(){//注册事件 this.eventObj.onmouseover=this.menuMouseOver; this.eventObj.onmouseout=this.menuMouseOut;};
GNB.prototype.menuMouseOver=function(){//鼠标经过 if(this.parentClass.MouseOverFlag!=false){return;} this.parentClass.MouseOverFlag=true; this.parentClass.clearTimeOut(); this.parentClass.menuMouseOverTimer();};
GNB.prototype.menuMouseOut=function(){//鼠标离开 this.parentClass.MouseOverFlag=false; this.parentClass.clearTimeOut(); this.parentClass.menuMouseOutTimer();};
GNB.prototype.menuMouseOverTimer=function(){//经过图片位置递增 var _7d=this; if(this.imageIndex>=this.iImgNum){return;} this.eventObj.scrollTop=this.imageIndex*this.iImgHeight; this.imageIndex++; this.setTimerID=setTimeout(function(){_7d.menuMouseOverTimer();},this.iOverSpeed);};
GNB.prototype.menuMouseOutTimer=function(){////经过图片位置递减 var _7e=this;if(this.imageIndex<0){return;} this.eventObj.scrollTop=this.imageIndex*this.iImgHeight; this.imageIndex--; this.setTimerID=setTimeout(function(){_7e.menuMouseOutTimer();},this.iOutSpeed);};
GNB.prototype.clearTimeOut=function(){//取消定时 clearTimeout(this.setTimerID);};// ]]></script>
xhtml
<div class="Gnb_btn_div" id="gnb_btn_01"><a class="Gnb_btn_img" href="#1" mce_href="#1">找朋友</a></div>
<script type="text/javascript">// <![CDATA[var GNB1=new GNB(document.getElementById("gnb_btn_01"));//实例单个按钮,当然也可以多个// ]]></script>
演示
运行代码框<!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" xml:lang="zh-cn" lang="zh-cn"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name='keywords' content='' /> <meta name='description' content='' /> <title>用javascript来实现动画导航</title> <style> <!-- /*我直接把CSS写这了*/ div.header{width:1000px;height:200px;margin:0 auto;position:relative} .Gnb_btn_div{width:90px;height:75px;overflow:hidden;display:block;position:absolute;} .Gnb_btn_img{width:100%;height:525px;display:block;overflow:hidden;text-indent:-500px;} #gnb_btn_01 .Gnb_btn_img {background-image: url(/u/info_img/2007-12/02/5711_friend.gif)} #gnb_btn_01 {bottom:12px;left:160px; } --> </style> </head> <body> <div class="header"> <div class="Gnb_btn_div" id="gnb_btn_01"><a class="Gnb_btn_img" href="#1">找朋友</a></div> </div> <script type="text/javascript"> // <![CDATA[ function GNB(_7c){ this.iImgNum=7; this.iImgHeight=75; this.iOverSpeed=50; this.iOutSpeed=50; this.eventObj=_7c; this.MouseOverFlag=false; this.imageIndex=0; if(this.eventObj==null){return;} this.eventObj.parentClass=this;this.eventAssign(); } GNB.prototype.eventAssign=function(){ this.eventObj.onmouseover=this.menuMouseOver; this.eventObj.onmouseout=this.menuMouseOut; }; GNB.prototype.menuMouseOver=function(){ if(this.parentClass.MouseOverFlag!=false){return;} this.parentClass.MouseOverFlag=true; this.parentClass.clearTimeOut(); this.parentClass.menuMouseOverTimer(); }; GNB.prototype.menuMouseOut=function(){ this.parentClass.MouseOverFlag=false; this.parentClass.clearTimeOut(); this.parentClass.menuMouseOutTimer(); }; GNB.prototype.menuMouseOverTimer=function(){ var _7d=this; if(this.imageIndex>=this.iImgNum){return;} this.eventObj.scrollTop=this.imageIndex*this.iImgHeight; this.imageIndex++; this.setTimerID=setTimeout(function(){_7d.menuMouseOverTimer();},this.iOverSpeed); }; GNB.prototype.menuMouseOutTimer=function(){ var _7e=this;if(this.imageIndex<0){return;} this.eventObj.scrollTop=this.imageIndex*this.iImgHeight; this.imageIndex--; this.setTimerID=setTimeout(function(){_7e.menuMouseOutTimer();},this.iOutSpeed); }; GNB.prototype.clearTimeOut=function(){ clearTimeout(this.setTimerID); }; var GNB1=new GNB(document.getElementById("gnb_btn_01")); //]]> </script> </body> </html> [Ctrl+A 全部选择 提示:你可先修改部分代码,再按运行]