奥米加兽Alter-B:帮我看看这段什么意思

从一个FLASH中找到的
slideLink = _parent[_targetInstanceName];
if (inertia<=1) {
inertia = 1.1;
}
xTarget = slideLink._x;
yTarget = slideLink._y;
slideLink.aTarget = slideLink._alpha;
slideLink.sTarget = slideLink._xscale;
if (xStart == 0) {
if (slideLink._x<=(Stage.width/2)) {
xStart = -slideLink._width;
} else {
xStart = Stage.width+slideLink._width;
}
}
if (yStart == 0) {
yStart = slideLink._y;
}
_visible = false;
slideLink._x = xStart;
slideLink._y = yStart;
slideLink.xTarget = xTarget;
slideLink.yTarget = yTarget;
slideLink._xscale = slideLink._yscale=beginScale;
slideLink._alpha = beginAlpha;
slideLink.onEnterFrame = function() {
if (this._x != this.xTarget) {
this._x -= (this._x-this.xTarget)/inertia;
}
if (this._y != this.yTarget) {
this._y -= (this._y-this.yTarget)/inertia;
}
if (this._xscale != 100) {
this._yscale = this._xscale -= (this._xscale-100)/inertia;
}
if (this._alpha != this.aTarget) {
this._alpha -= (this._alpha-this.aTarget)/inertia;
}
};