function DrawImage(ImgD,iwidth,iheight){    
    
    var image=new Image();    
     image.src=ImgD.src;    
    if(image.width>0 && image.height>0){    
      if(image.width/image.height>= iwidth/iheight){    
          if(image.width>iwidth){      
               ImgD.width=iwidth;    
               ImgD.height=(image.height*iwidth)/image.width;    
           }else{    
               ImgD.width=image.width;      
               ImgD.height=image.height;    
           }    
       }else{    
          if(image.height>iheight){      
               ImgD.height=iheight;    
               ImgD.width=(image.width*iheight)/image.height;            
           }else{    
               ImgD.width=image.width;      
               ImgD.height=image.height;    
           }    
       }    
     }    
}