基础 - 运动框架

function  funStyle(obj,attr){    return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj,false)[attr];}function funStartMove(obj,json,fnFinish,time){    funStopMove(obj);    funMove(obj,json,fnFinish);    obj.timer = setInterval(function(){        funMove(obj,json,fnFinish);    },time);}function funStopMove(obj){    clearInterval(obj.timer);}function funMove(obj,json,fnFinish){    obj.bStop = true;    for (var attr in json) {        funPartMove(obj,attr,json[attr]);    }    if (obj.bStop) {        funStopMove(obj);        if (fnFinish) fnFinish();    }}function funPartMove(obj,attr,iTarget){    if (attr=="opacity") {        obj.myValue = Math.round(parseFloat(funStyle(obj,attr))*100);    }else{        obj.myValue = parseInt(funStyle(obj,attr));    }    if (obj.myValue!=iTarget) {        // 匀速运动        obj.iSpeed = obj.myValue<iTarget?1:-1;        //缓冲运动        // obj.iSpeed = (iTarget-obj.myValue)/30;        // obj.iSpeed =obj.iSpeed>0?Math.ceil(obj.iSpeed):Math.floor(obj.iSpeed);        obj.myValue += obj.iSpeed;        if (attr=="opacity") {            obj.style.filter = "alpha(opacity:"+obj.myValue+")";            obj.style.opacity = obj.myValue*0.01;        }else{            obj.style[attr] = obj.myValue+"px";        }        if (obj.myValue!=iTarget) obj.bStop = false;    }}