function move () {
    var nextTime = getTimer ();
    var diffTime = nextTime - startTime;
　trace([this,diffTime,startTime]);
    if (diffTime >= 1000) {
        startTime = getTimer ();
        this._x += 5;
        if (this._x >= 100) {
            delete this.onEnterFrame;
        }
    }
}
stop ();

b_mc.onEnterFrame = move;
c_mc.onEnterFrame = move;
d_mc.onEnterFrame = move;
a_mc.onEnterFrame = move;

function move () {
    var nextTime = getTimer ();
    var diffTime = nextTime - this.startTime;
    if (diffTime >= 1000) {
        this.startTime = getTimer ();
        this._x += 5;
        if (this._x >= 300) {
            delete this.onEnterFrame;
        }
    }
}
stop ();
b_mc.startTime = c_mc.startTime = d_mc.startTime = a_mc.startTime = getTimer();
b_mc.onEnterFrame = move;
c_mc.onEnterFrame = move;
d_mc.onEnterFrame = move;
a_mc.onEnterFrame = move;