链式变化动画，，，，
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>链式变化动画</title>
<style type="text/css">
*{
margin:0;
padding:0;
}
div {
width:300px;
height:100px;
background:red;
margin-bottom: 10px;
border: 1px black solid;
filter:Alpha(opacity:333);
opacity: 0.333;
}
</style>
<script type="text/javascript">
window.onload=function(){
/*var aLi=document.getElementsByTagName('div');
for(var i=0;i<aLi.length;i++){
aLi[i].timer=null;
aLi[i].onmouseover=function(){
startMove(this,400);
}
aLi[i].onmouseout=function(){
startMove(this,200);
}
}*/
var odiv1=document.getElementById('div1');
var odiv2=document.getElementById('div2');
var odiv3=document.getElementById('div3');
var odiv4=document.getElementById('div4');
odiv1.onmouseover=function(){
startMove(this,'width',400);
}
odiv1.onmouseout=function(){
startMove(this,'width',300);
}
odiv2.onmouseover=function(){
startMove(this,'height',200);
}
odiv2.onmouseout=function(){
startMove(this,'height',100);
}
//透明度变化动画
odiv3.onmouseover=function(){
startMove(this,'opacity',100);
}
odiv3.onmouseout=function(){
startMove(this,'opacity',55);
}
//链式动画
odiv4.onmouseover=function(){
startMove2(this,'width',400, function (){
startMove2(odiv4,'height',200,function(){
startMove2(odiv4,'opacity',100)
})//这里odiv4不能用this！！！
//alert(this);//输出object window
});
}
odiv4.onmouseout=function(){
startMove2(this,'width',300,function(){
startMove2(odiv4,'height',100,function(){
startMove2(odiv4,'opacity',30)
})
});
}
}
function startMove2(obj,attrr,iTarget,fn){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var icur=0;
if(attrr=='opacity'){
// icur=parseFloat(getStyle(obj,attrr))*100;//小数在计算机中表示存在误差
icur=Math.round(parseFloat(getStyle(obj,attrr))*100);
//alert(parseFloat(getStyle(obj,attrr))*100);
}
else{
icur=parseInt(getStyle(obj,attrr));
}
var speed=(iTarget-icur)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
/*if(icur>iTarget){
speed=-10;
}
else {
speed=10;
}*/
if(iTarget==icur){
clearInterval(obj.timer);
if(fn){
fn();
}
}else{
if(attrr=='opacity'){
obj.style.filter='alpha(opacity:'+(icur+speed)+')';
obj.style.opacity=(icur+speed)/100;
}
else{
obj.style[attrr] =icur+speed+'px';
}
}
},30);
}
function startMove(obj,attrr,iTarget){
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var icur=0;
if(attrr=='opacity'){
// icur=parseFloat(getStyle(obj,attrr))*100;//小数在计算机中表示存在误差
icur=Math.round(parseFloat(getStyle(obj,attrr))*100);
//alert(parseFloat(getStyle(obj,attrr))*100);
}
else{
icur=parseInt(getStyle(obj,attrr));
}
var speed=(iTarget-icur)/10;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
/*if(icur>iTarget){
speed=-10;
}
else {
speed=10;
}*/
if(iTarget==icur){
clearInterval(obj.timer);
}else{
if(attrr=='opacity'){
obj.style.filter='alpha(opacity:'+(icur+speed)+')';
obj.style.opacity=(icur+speed)/100;
}
else{
obj.style[attrr] =icur+speed+'px';
}
}
},30);
}
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];//IE
}else{
return getComputedStyle(obj,false)[attr];//火狐
}
}
/*function startMove(obj,attrr,iTarget){
// var aLi=document.getElementsByTagName('div');
clearInterval(obj.timer);
obj.timer=setInterval(function(){
var speed;
if(parseInt(getStyle(obj,attrr))>iTarget){
speed=-10;
}
else {
speed=10;
}
if(iTarget==parseInt(getStyle(obj,attrr))){
clearInterval(obj.timer);
}else{
obj.style[attrr] =parseInt(getStyle(obj,attrr))+speed+'px';
}
},30);
}*/
</script>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
</body>
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