//ͼƬ´óС×ÔÊÊÓ¦
function DrawImage(ImgD,w,h)
{
	var image=new  Image();  
	image.src=ImgD.src;
	if(image.width>0  &&  image.height>0)
	{
		if(image.width/image.height>= w/h)
		{
			if(image.width>w)
				ImgD.width=w;
			else
			{
				ImgD.width=image.width;
				ImgD.height=image.height;
			}
				//ImgD.alt=image.width+'?¨¢'+image.height;
		}
		else
		{
			if(image.height>h)
				ImgD.height=h;
			else
			{
				ImgD.width=image.width;
				ImgD.height=image.height;
			 }
			//ImgD.alt=image.width+'?¨¢'+image.height;
		}
	}
}