// % img
var flag=false; 

function DrawImage(ImgD){ 
	var image=new Image(); 
	image.src=ImgD.src; 
	if(image.width>0 && image.height>0){
		flag=true; 
		if(image.width/image.height>= 650/800){ 
			if(image.width>650){
				ImgD.width=650; 
				ImgD.height=(image.height*650)/image.width; 
			}else{ 
				ImgD.width=image.width;
				ImgD.height=image.height; 
			} 
		}else{ 
			if(image.height>800){
				ImgD.height=800; 
				ImgD.width=(image.width*800)/image.height; 
			}else{ 
				ImgD.width=image.width;
				ImgD.height=image.height; 
			} 
		} 
	}
}