// 运动函数
function starMove(obj,json,fnEnd){
clearInterval(obj.timer);
obj.timer = setInterval(function(){
var bStop = true;
for(var name in json){
var iTarget = json[name]; // 目标点
if(name = 'opacity'){
var cur = parseInt(parseFloat(getStyle(obj,name))*100);
}else{
var cur = parseInt(getStyle(obj,name));
}
var speed = (iTarget-cur)/8;
speed = speed>0?Math.ceil(speed):Math.floor(speed);// 每30毫秒运动的距离，数值越小运动越慢
if(name = 'opacity'){
obj.style.opacity = (cur+speed)/100;
}else{
obj.style[name]= cur+speed+'px';
}
if(cur != iTarget){
bStop = false;
}
}
if(bStop){
clearInterval(obj.timer);
if(fnEnd){
fnEnd();
}
}
},30);
}
// 获取css样式
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}else{
return obj.getComputedStyle(obj)[attr];
}
}