您现在的位置：天下网吧 >> 网吧天地 >> 天下码农 >> 数据库 >> 正文

用javascript来实现动画导航

2008-5-18不详佚名

【大中小】

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(http://www.wler.cn/blog/img/friend.gif)
}

javascript：

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

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>  </style> </head> <body> <div class="header"> <div class="Gnb_btn_div" id="gnb_btn_01"><a class="Gnb_btn_img" href="http://www.68design.net/Web-Guide/HTMLCSS/27932-1.html#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 ]

欢迎访问最专业的网吧论坛,无盘论坛,网吧经营,网咖管理,网吧专业论坛https://bbs.txwb.com

关注天下网吧微信,了解网吧网咖经营管理，安装维护: