var _Scene_Skill_createBackground = Scene_Job.prototype.createBackground;
Scene_Job.prototype.createBackground = function(){
if(bgBitmapJob){
this._backgroundSprite = new Sprite();
this._backgroundSprite.bitmap =
ImageManager.loadPicture(bgBitmapJob);
this.addChild(this._backgroundSprite);
return;
}
// if background file is invalid, it does original process.
_Scene_Skill_createBackground.call(this);
};