var flag=false; 
function DrawImage(ImgD,ImgW,ImgH,PhotoH){ 
	var image=new Image(); 
	image.src=ImgD.src; 
	if(image.width>0 && image.height>0){ 
		flag=true; 
		if(image.width/image.height>= ImgW/ImgH){ 
			if(image.width>ImgW){ 
				ImgD.width=ImgW; 
				ImgD.height=(image.height*ImgW)/image.width; 
			}else{ 
				ImgD.width=image.width; 
				ImgD.height=image.height; 
			} 
/*ImgD.alt="bigpic" */ 
		}else{ 
			if(image.height>ImgH){ 
				ImgD.height=ImgH; 
				ImgD.width=(image.width*ImgH)/image.height; 
			}else{ 
				ImgD.width=image.width; 
				ImgD.height=image.height; 
			} 
/*ImgD.alt="bigpic" */ 
		}
		ImgD.style.marginTop=(PhotoH-ImgD.height)/2;
	} 
}