本文实例讲述了JS模拟酷狗音乐播放器收缩折叠关闭效果代码。分享给大家供大家参考，具体如下：

这是一款模拟酷狗音乐播放器的关闭特效，采用JavaScript实现，关闭的时候播放界面缩成一条线，然后消失，就像有些电视机突然停电的效果，很有意思的网页动画特效。

运行效果截图如下：

在线演示地址如下：

具体代码如下：

/p>

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

酷狗音乐播放器的关闭特效，采用JavaScript实现

* {

padding:0px;

margin:0px;

}

#outer {

width:952px;

height: 640px;

position:absolute;

left:100px;

top:20px; }

#div1 {

width:952px;

height: 640px;

overflow:hidden;

position:absolute;font-size:0px;

}

#div1 a {

position:absolute;

width:23px;

height:21px;

right:5px;

top:5px;

display:block; z-index:100; background:url(images/kugou.jpg) no-repeat 957px 645px;}

#div1 a:hover {

background:url(images/hover.jpg) no-repeat right top;

}

#line {

height:3px;

width:952px;

display:none;

z-index:100;

position:absolute;

left:0px;

top:0px; font-size:0px;

}

#light{ /*width:50px; height:10px;*/ position:absolute; left:50%; top:50%;/* margin-left:-25px; margin-top:-5px;*/ width:0px; height:0px; filter:alpha(opacity:0);opacity:0;); overflow:hidden;}

function css(obj, attr, value)

{

if(arguments.length==2)

{

if(attr!='opacity')

{

return parseInt(obj.currentStyle?obj.currentStyle[attr]:document.defaultView.getComputedStyle(obj, false)[attr]);

}

else

{

return Math.round(100*parseFloat(obj.currentStyle?obj.currentStyle[attr]:document.defaultView.getComputedStyle(obj, false)[attr]));

}

}

else if(arguments.length==3)

switch(attr)

{

case 'width':

case 'height':

case 'paddingLeft':

case 'paddingTop':

case 'paddingRight':

case 'paddingBottom':

value=Math.max(value,0);

case 'left':

case 'top':

case 'marginLeft':

case 'marginTop':

case 'marginRight':

case 'marginBottom':

obj.style[attr]=value+'px';

break;

case 'opacity':

obj.style.filter="alpha(opacity:"+value+")";

obj.style.opacity=value/100;

break;

default:

obj.style[attr]=value;

}

return function (attr_in, value_in){css(obj, attr_in, value_in)};

}

var MIAOV_MOVE_TYPE={

BUFFER: 1,

FLEX: 2

};//json

function miaovStopMove(obj)

{

clearInterval(obj.timer);

}

function miaovStartMove(obj, oTarget,iSpeedCtrol, iType, fnCallBack, fnDuring)

{

var fnMove=null;

if(obj.timer)

{

clearInterval(obj.timer);

}

switch(iType)

{

case MIAOV_MOVE_TYPE.BUFFER:

fnMove=miaovDoMoveBuffer;

break;

case MIAOV_MOVE_TYPE.FLEX:

fnMove=miaovDoMoveFlex;

break;

}

obj.timer=setInterval(function (){

fnMove(obj, oTarget,iSpeedCtrol, fnCallBack, fnDuring);

}, 30);

}

function miaovDoMoveBuffer(obj, oTarget,iSpeedCtrol, fnCallBack, fnDuring)

{

var bStop=true;

var attr='';

var speed=0;

var cur=0;

for(attr in oTarget)

{

cur=css(obj, attr);

if(oTarget[attr]!=cur)

{

bStop=false;

speed=(oTarget[attr]-cur)/iSpeedCtrol;

speed=speed>0?Math.ceil(speed):Math.floor(speed);

css(obj, attr, cur+speed);

}

}

if(fnDuring)fnDuring.call(obj);

if(bStop)

{

clearInterval(obj.timer);

obj.timer=null;

if(fnCallBack)fnCallBack.call(obj);

}

}

function miaovDoMoveFlex(obj, oTarget,iSpeedCtrol, fnCallBack, fnDuring)

{

var bStop=true;

var attr='';

var speed=0;

var cur=0;

for(attr in oTarget)

{

if(!obj.oSpeed)obj.oSpeed={};

if(!obj.oSpeed[attr])obj.oSpeed[attr]=0;

cur=css(obj, attr);

if(Math.abs(oTarget[attr]-cur)>=1 || Math.abs(obj.oSpeed[attr])>=1)

{

bStop=false;

obj.oSpeed[attr]+=(oTarget[attr]-cur)/iSpeedCtrol;

obj.oSpeed[attr]*=0.7;

css(obj, attr, cur+obj.oSpeed[attr]);

}

}

if(fnDuring)fnDuring.call(obj);

if(bStop)

{

clearInterval(obj.timer);

obj.timer=null;

if(fnCallBack)fnCallBack.call(obj);

}

}

window.οnlοad=function(){

var oDiv1 = document.getElementById('div1');

var oAbtn = oDiv1.getElementsByTagName('a')[0];

var oImg1 = document.getElementById('img1');

var oImg2 = document.getElementById('img2');

var oImg3 = document.getElementById('img3');

var oLine = document.getElementById('line');

var oLight = document.getElementById('light');

oAbtn.οnclick=function(){

miaovStartMove(oDiv1, {height:3,marginTop:315},1.5, MIAOV_MOVE_TYPE.BUFFER,function(){

oImg1.style.display='none';

oLine.style.display='block';

miaovStartMove(oDiv1, {width:0,marginLeft:476},2, MIAOV_MOVE_TYPE.BUFFER);

miaovStartMove(oLine, {width:0},2, MIAOV_MOVE_TYPE.BUFFER);

miaovStartMove(oImg2, {width:0},2, MIAOV_MOVE_TYPE.BUFFER,function(){

miaovStartMove(oImg3, {width:200,height:10},1, MIAOV_MOVE_TYPE.BUFFER);

miaovStartMove(oLight, {width:200,height:10,marginLeft:-100,marginTop:-5,opacity:100},1, MIAOV_MOVE_TYPE.BUFFER,function(){

miaovStartMove(oLight, {opacity:0},1, MIAOV_MOVE_TYPE.BUFFER);

});

});

});

}

}

希望本文所述对大家JavaScript程序设计有所帮助。