有人用过这个FLASH幻灯不,载进来的图片大小设不定

flash里的脚本
1.
function loadInfoBMP(bmpa, n)
{
    var _loc5 = new flash.display.BitmapData(bmpa.width, bmpa.height, true, 4.294967E+009);
    _loc5.copyChannel(bmpa, bmpa.rectangle, new flash.geom.Point(0, 0), 1, 8);
    info_array[n] = _loc5;
    for (var _loc2 = n + 1; _loc2 < info_array.length; ++_loc2)
    {
        if (info_array[_loc2].indexOf(".jpg") >= 0)
        {
            bmpList.getBMP(info_array[_loc2], loadInfoBMP, this, _loc2);
            return;
        } // end if
    } // end of for
    nextFrame ();
} // End of the function
function bmpObject()
{
    this.tp_bmp = new flash.display.BitmapData(image_width,image_height);
    this.load_mc = tp_load_mc.mc.mc;
    this.myLoad = new MovieClipLoader();
    this.loadObj = {_parentObj: this};
    this.loadObj.onLoadInit = function ()
    {
        this._parentObj.drawBMP();
        this._parentObj.loadOK();
    };
    this.loadObj.onLoadError = function ()