CSS+Js遮罩效果的TAB及焦点图片切换(推荐)- Javascript

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Javascript 中的 CSS+Js遮罩效果的TAB及焦点图片切换(推荐)

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2010-01-10 浏览: 304 ::

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让Firefox支持event对象实现代码 javascript showModalDialog传值与FireFox的window.open 父子窗口传值示例

CSS+Js图片切换技术，类似的已有不少了，这一个使用了遮罩过渡的效果，同样应用到了TAB选项卡上，本页面仅是为了演示，大家用时候把它拆分开来，这个效果也对学习图片效果制作很有帮助。

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Js遮罩效果的TAB及图片切换</title>
<style>
div, ul, ol, li, dl, dt, dd {
margin:0;
padding:0;
}
.imgFlash,.tab{margin:auto}
/*------焦点图片的css-------*/
.imgFlash {
height:230px;width:270px;
position:relative;
}
.imgFlash dl { height:100%; overflow:hidden; position:absolute; width:100%;
}
.imgFlash img { height:100%; position:absolute; width:100%; background-color: #FFFFFF; background-repeat: no-repeat; background-position: center center;
}
.imgFlash dt {
bottom:0;
font-size:12px;
height:24px;line-height:24px;
left:0;
position:absolute;
width:100%;
z-index:1;
}
.imgFlash dt span { background-color:#000000; height:100%; opacity:0.4;filter:Alpha(Opacity=40); position:absolute; width:100%;
}
.imgFlash dt a {
color:#FFFFFF;
position:absolute;
text-decoration:none;
text-indent:5px;
z-index:1;
}
.imgFlash dt a:hover {
text-decoration:underline;
}
.imgFlash div {
bottom:8px;
cursor:pointer;
display:block;
position:absolute;
right:8px;
z-index:99999;
}
.imgFlash div em {
background-color:#000000;
border:1px solid #FFFFFF;
display:block;
float:right;
height:4px;
margin-right:3px;
filter:Alpha(Opacity=50);opacity:0.5;
overflow:hidden;
width:4px;
}
.imgFlash div em.d {/*激活的小方块的样式*/
background-color:#CC0000;
filter:Alpha(Opacity=80);
opacity:0.8;
}
/*-------------------------Tab的css----------------------------*/
.tab,.tab ul{list-style-type: none;}
.tab{ width:270px; background-color:#FFFFFF; height: 160px; font-size: 12px; position: relative; border-top-width: 30px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #0066FF; border-right-color: #0066FF; border-bottom-color: #0066FF; border-left-color: #0066FF;
}
.tab ul { position: absolute; top: -30px;
}
.tab li{ float:left; background-color:#A9CEEB; background-repeat:no-repeat; background-position:left top; margin-top:5px; margin-left: 5px;
}
.tab li.d { background-color: #FFFFFF;
}
.tab li a{text-decoration:none;display:block;padding-right:8px;padding-left:8px;line-height:25px;color:#2B6FA2;}
.tab li.d a{color:#0C3E74;}
.tab li ul{ border-bottom-style:none; position:absolute; left:0px; top:30px; background-color: #FFFFFF; padding-top: 10px; width: 270px;
}
.tab li li{ float:none; background-image:none; margin:0px; background-color: #FFFFFF;
}
.tab li li a{ background-image:none; line-height:22px; color: #000000; float: none; height: 22px;
}
.tab li ul li a:hover{text-decoration:underline;}
.tab li.d li a{color:#000000;}
</style>
<script language="javascript">
var $ = function (d){return document.getElementById( d );};
var isIE = (document.all) ? true : false;
var Bind = function (obj,fun,arr){return function() {arr || (arr = arguments);return fun.apply(obj,arr);}};//绑定
var Tween = function(t,b,c,d){return c*t/d + b;};//缓冲函数
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; }
};//事件监听
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;
}
};//移除监听
var Timer = {};//Timer
Timer.add = function (fn){return new this.fn(fn)};
Timer.fn = function (fn){
var timer;
this.play = function (speed,only){
speed || ( speed = 10 ); if(only)timer = window.setTimeout(fn,speed);
else timer = window.setInterval(fn,speed);
};
this.stop = function (){clearTimeout(timer);clearInterval(timer)};
};
//Mask 遮罩动画
var Mask = function (){ this.fl = Timer.add(Bind(this,this.fn)); this.from_num = 0; this.speed = 50;//动画速度，越大越慢
};
Mask.prototype.ready = function (ele,pos){
if(this.ele)this.set(this.maxWidth,this.maxHeight);
this.ele = ele;
this.maxWidth = this.ele.offsetWidth; this.maxHeight = this.ele.offsetHeight; this.ele.style.position = "absolute"; this.from_num = 0; if(!pos){ var x = ["left","center","right",""][parseInt(4*Math.random())],
y = ["top","center","bottom",""][parseInt(4*Math.random())]; if(x == "" && y == "")x = "left";//避免同时为"" this.position = [x,y]; }else{ this.position = pos; } this.set(0,0); this.fl.stop();
};
Mask.prototype.start = function (){this.fl.play();};
Mask.prototype.stop = function (){this.fl.stop();};
Mask.prototype.set = function (width,height){//设置遮罩的矩形，用于定位遮罩的变换方向
var t,r,b,l; switch(this.position[0]){ case "left" : l = 0; r = width; break; case "center" : l = (this.maxWidth - width)/2; r = (this.maxWidth + width)/2; break; case "right" : l = this.maxWidth - width; r = this.maxWidth; break; default: l = 0; r = this.maxWidth; }
switch(this.position[1]){ case "top" : t = 0; b = height; break; case "center" : t = (this.maxHeight - height)/2; b = (this.maxHeight + height)/2; break; case "bottom" : t = this.maxHeight - height; b = this.maxHeight; break; default : t = 0; b = this.maxHeight; break; } this.ele.style.clip = "rect(" + t + "px," + r + "px," + b + "px," + l + "px)" ;
};
Mask.prototype.fn = function (){
var w,h;
this.from_num ++ ; if(this.from_num<=this.speed){ w = Tween(this.from_num,0,this.maxWidth,this.speed); h = Tween(this.from_num,0,this.maxHeight,this.speed); this.set(w,h); }else{ this.fl.stop(); //this.start();//若不需要重复动画，把这句注释，上句不注释 }
};
function ImgFlash(box){
this.box = box.getElementsByTagName("dl"); this.ge = 4;//切换间隔秒数 this.menu = []; this.mask = new Mask();//加载遮罩动画，不设置参数 即 随机效果 this.zIndex = this.box.length; var _div = document.createElement('div'); this.dang = 0; for(i=0;i<this.zIndex;i++){ this.box[i].style.zIndex = this.zIndex-i; var _em = document.createElement('em'),_span = document.createElement('span'); var _dt = this.box[i].getElementsByTagName("dt")[0]; _dt.appendChild(_span); addEventHandler(_em,'mouseover',Bind(this,this.emEvent,[this.zIndex-i-1,true])); _div.appendChild(_em); this.menu.push(_em); if(this.zIndex-i==1){ _em.className = 'd'; } } box.appendChild(_div); addEventHandler(box,'mouseover',Bind(this,function(){this.fl.stop()})); addEventHandler(box,'mouseout',Bind(this,function(){this.fl.play(this.ge*1000)})); this.fl = Timer.add(Bind(this,this.enterFrame)) this.fl.play(this.ge*1000);
}
ImgFlash.prototype.enterFrame = function(){
var ddd = this.dang==2?0:this.dang+1; this.emEvent(ddd);
};
ImgFlash.prototype.emEvent = function (index,b){ if(b)this.fl.stop(); if(index == this.dang)return; this.menu[this.menu.length-1-this.dang].className=""; var odl = this.box[this.dang]; this.zIndex++; this.dang = index; this.menu[this.menu.length-1-this.dang].className="d"; var ndl = this.box[this.dang]; var img = ndl.getElementsByTagName("img")[0]; this.mask.ready(img); this.mask.start(); ndl.style.zIndex = this.zIndex;
}
function Tab(id,type){
var nav = id.getElementsByTagName("ul")[0].childNodes;
var _nav,i=0;
this.mask = new Mask();//初始化遮罩动画
this.z = 1000;
while(_nav = nav[i++]){
if(_nav.className=="d")this.focusEle = _nav;
if(_nav.childNodes.length>1){
var A = _nav.getElementsByTagName("A")[0];
addEventHandler(A,type,Bind(this,fun,[A]));
}
if(_nav.nodeType == 1)_nav.getElementsByTagName("UL")[0].style.zIndex = nav.length-i;
}
function fun(ele){
var li = ele.parentNode;
var ul = li.getElementsByTagName("UL")[0];
this.z += 1
ul.style.zIndex = this.z;
if(li.className=="d")return;
li.className+=(li.className.length>0? " ": "") + "d";
this.focusEle.className=this.focusEle.className.replace(/( ?|^)d\b/g, "");
this.focusEle = li;
this.mask.ready(ul);
this.mask.start();
};
}
</script>
</head>
<body>
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</div>
<div class="tab" id="tab1">
<ul>
<li class="d"><a href="javascript:;">WEB前端</a>
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</ul>
</div>
<script>
new ImgFlash($("box"));//初始化
new Tab($("tab1"),"mouseover");
</script>
</body>
</html>

[Ctrl+A 全选提示:你可先修改部分代码,再按运行]

其实这个不只是效果，代码也是非常值得学习的。大家主要是注意页面最下面的代码
<script>
new ImgFlash($("box"));//初始化
new Tab($("tab1"),"mouseover");
</script>

让Firefox支持event对象实现代码 javascript showModalDialog传值与FireFox的window.open 父子窗口传值示例

Javascript 中的 CSS+Js遮罩效果的TAB及焦点图片切换(推荐)

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