function displayImage(imgSrc, imgW, imgH, newsDiv)
{
	
	var newsID=newsDiv.style.display;//1
	newsDiv.style.display="block";//2
	
	imgOldW = imgSrc.width;
	imgOldH = imgSrc.height;
	
	
	if(newsID=="none"){//3
	  newsDiv.style.display="none";
	}
	//注:1,2,3的作用是使所有调用了displayImage()的层变为block,因为要获取图片的大小,则图片所在的层要为block;
	//获取到图片大小后,再把原来为none的层变回none;
	if((imgOldW != 0) && (imgOldH !=0))
	{
		
		if(imgOldW <= imgW && imgOldH <= imgH)
		{
			imgNewW = imgOldW;
			imgNewH = imgOldH;
		}
		else
		{
			imgWH = imgW/imgH;      
			imgOldWH = imgOldW/imgOldH;
			
			if(imgWH <= imgOldWH)
			{
			   imgNewW = imgW;
			   imgNewH = imgNewW*(imgOldH/imgOldW);
			}
			else
			{
			   imgNewH = imgH;
			   imgNewW = imgNewH*(imgOldW/imgOldH);
			}
      
		}
		imgSrc.width  = imgNewW;
		imgSrc.height = imgNewH;
		return imgSrc;
	}
	else
	{
		imgSrc.width = imgW;
		imgSrc.height= imgH;
		return imgSrc;
	}
}
function displayImage(imgSrc, imgW, imgH)
{
	imgSrc.style.display="block";
	imgOldW = imgSrc.width;
	imgOldH = imgSrc.height;
	
	if((imgOldW != 0) && (imgOldH !=0))
	{
		
		if(imgOldW <= imgW && imgOldH <= imgH)
		{
			imgNewW = imgOldW;
			imgNewH = imgOldH;
		}
		else
		{
			imgWH = imgW/imgH;      
			imgOldWH = imgOldW/imgOldH;
			
			if(imgWH <= imgOldWH)
			{
			   imgNewW = imgW;
			   imgNewH = imgNewW*(imgOldH/imgOldW);
			}
			else
			{
			   imgNewH = imgH;
			   imgNewW = imgNewH*(imgOldW/imgOldH);
			}
      
		}
		imgSrc.width  = imgNewW;
		imgSrc.height = imgNewH;
		return imgSrc;
	}
	else
	{
		imgSrc.width = imgW;
		imgSrc.height= imgH;
		return imgSrc;
	}
}
function showErrorImage(image){
	image.src="/product/images/default.gif";
	image.style.display="block";
}