if url not found

[kofa]

hello all

this is function to load smooth external images

onFrame (1) {

    MovieClip.prototype.LoadSmoothImage = function(Url,maxW,maxH,redraw) {
        this.createEmptyMovieClip("mc",this.getNextHighestDepth());
        this.mc.loadMovie(Url);              
        this.onEnterFrame = function() {
            if (this.mc.getPercentLoaded() == 100) { 
                delete this.onEnterFrame 
                this.mc._xscale = this.mc._yscale = 100;       
                this.ow = this.mc._width;
                this.oh = this.mc._height;
                this.x_ratio = maxW / this.ow;
                this.y_ratio = maxH / this.oh; 
                if (this.mc._width > maxW || this.mc._height > maxH) {
                    if ((this.x_ratio * this.oh) < maxH) {
                        this.mc._height = Math.ceil(this.x_ratio * this.oh);
                        this.mc._width = this.size._width;
                    } else {
                        this.mc._width = Math.ceil(this.y_ratio * this.ow);
                        this.mc._height = maxW;
                    }
                }            
                if (redraw) {
                    this.bitmap=new flash.display.BitmapData(this.mc._width,this.mc._height, true, 0xff0000);
                                    
                    this.mc.attachBitmap(this.bitmap,this.mc.getNextHighestDepth(),"auto",true);
                    this.bitmap.draw(this.mc);      
                    this.mc.forceSmoothing = true ;      
                    }                    
                
                }
            }
        }
        for( i=1;i < 10;i++){
           
   _parent["mc"+i].LoadSmoothImage(String(i)+".jpg",320,320,true);    
    }
         
} 

i want add code to this function if image not found in url path

ex

if_parent["mc"+i] not found (i) .jpg====> parent["mc"+i] load "0.jpg"

thanks for help