function ShowImage(ImgD,proMaxWidth,proMaxHeight){
	var image= new Image();
	image.src = ImgD.src;
	if(image.width>0 && image.height>0){
		var rate = (proMaxWidth/image.width < proMaxHeight/image.height)?proMaxWidth/image.width:proMaxHeight/image.height; 
		 
		if(rate <= 1){
			$(ImgD).width(image.width*rate); 
			$(ImgD).height(image.height*rate); 
	    } 
		else {  
			$(ImgD).width(image.width); 
			$(ImgD).height(image.height);
		} 
	} 
	$(ImgD).css('visibility','visible');
}