this.ShowImage=function(ImgD,proMaxWidth,proMaxHeight){
     var image=new Image();
     image.src=ImgD.src;
   
     if(image.width>0 && image.height>0){
      if(image.width/image.height>= proMaxWidth/proMaxHeight)
		  {
			if(image.width>proMaxWidth)
			{
			 ImgD.width=proMaxWidth;
			 ImgD.height=(image.height*proMaxWidth)/image.width;
			}
			else
			{
			 ImgD.width=image.width;
			 ImgD.height=image.height;
			}
		   }
			else
			{
			if(image.height>proMaxHeight)
			{
			 ImgD.height=proMaxHeight;
			 ImgD.width=(image.width*proMaxHeight)/image.height;
			}
			else
			{
			 ImgD.width=image.width;
			 ImgD.height=image.height;
			}
		}
       //´¹Ö±¾ÓÖÐ
       ImgD.style.marginTop=((proMaxHeight-ImgD.height)/2)+"px";
       ImgD.style.marginBottom=((proMaxHeight-ImgD.height)/2)+"px";
      
     }
    }