完美运动框架

/**
 * Created by linxd on 2015/6/6.
 */


function getStyle(obj, name) {
    if (getComputedStyle) {
        return getComputedStyle(obj, null)[name];
    } else {
        return obj.currentStyle[name];
    }
}

function startMove(obj, json, fnEnd) {
    clearInterval(obj.timer);
    obj.timer=setInterval(function () {
        var bStop = true;
        for (var attr in json) {
            var cur = 0;
            if (attr == "opacity") {
                cur = Math.round(parseFloat(getStyle(obj, attr))*100);
            } else {
                cur = parseInt(getStyle(obj, attr));
            }
            var speed = (json[attr]-cur)/6;

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

            if (cur != json[attr]) {
                bStop = false;
            }

            if (attr == "opacity") {
                obj.style.filter = "alpha(opacity:" + (cur+speed) + ")";
                obj.style.opacity = (cur+speed)/100;
            } else {
                obj.style[attr] = cur + speed + "px";
            }
        }

        if (bStop) {
            clearInterval(obj.timer);
            if (fnEnd) fnEnd();
        }
    }, 30);
}

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