function DrawImage_bak(ImgD,wvar,hvar)
{
  var flag=false;
  var image=new Image();
  var iwidth = wvar; 
  var iheight = hvar;
  image.src=ImgD.src;
  if(image.width>0 && image.height>0)
  {
    flag=true;
    if(image.width/image.height>= iwidth/iheight)
    {
      
        ImgD.width=iwidth;
        ImgD.height=(image.height*iwidth)/image.width;
     
     
      ImgD.alt=image.width+"x"+image.height;
    }
    else
    {
      
        ImgD.height=iheight;
        ImgD.width=(image.width*iheight)/image.height; 
     
      ImgD.alt=image.width+"x"+image.Height;      
    }
  }
}
//by dengqiye   obj:object of the picture  maxW: the width of the container  maxH:the height of the container
 function DrawImage(obj,maxW,maxH){
            var imgH=obj.height;
            var imgW=obj.width;
            
            if(obj.height>maxH)
            {
            //    obj.height=maxH;
           //     obj.widht=(obj.width*(maxH/imgH));
           //     imgH=maxH;
                imgW=obj.width;
            }
            
            if(obj.width>maxW)
            {
                obj.width=maxW;
                obj.height=(maxW/imgW)*imgH;
                imgW=maxW;
                imgH=obj.height;
            }
            
			obj.alt = obj.width+"x"+obj.height;
            //obj.style.marginTop=(maxH-obj.height)/2;
            //obj.style.marginLeft=(maxW-obj.width)/2;
        }