window.οnlοad=function(){
var aLi=document.getElementsByTagName('li');
for(var i=0;i<aLi.length;i++){
aLi[i].timer=null;
aLi[i].οnmοuseοver=function(){
startMove(this,attr,400);
}
aLi[i].οnmοuseοut=function(){
startMove(this,attr,200);
}
}
}
//
var timer=null;
var alpha=30;
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr];
}
}
// startMove(obj,{attr1:iTarget1,attr2:iTarget2},fn)
function startMove(obj,json,fn){
var flag=true;
clearInterval(obj.timer);
obj.timer=setInterval(function(){
for(var attr in json){
var icur=0;
if(icur=='opacity'){
icur=Math.round(parseFloat(getStyle(obj,attr))*100);
}else{
icur=parseInt(getStyle(obj,attr));
}
//2.计算速度
var speed=(json[attr]-icur)/8;
speed=speed>0?Math.floor(speed):Math.ceil(speed);
//3.检测停止
if(icur!=json[attr]){
flag=false;
}
if(attr=='opacity'){
obj.style.filter='alpha(opacity:'+(icur+speed)+')';
obj.style.opacity=(icur+speed)/10;
}else{
obj.style[attr]=icur+speed+'px';
}
}
if(flag){
clearInterval(obj.timer);
if(fn){
fn();
}
}
},30)
}
