function showProductImg(pic, height)
{
	document.getElementById('product_img').src = pic;
	if(height > 200)
	{
		document.getElementById('product_img').height = 200;
	}
	else
	{
		document.getElementById('product_img').height = height;
	}
	var topPos = (235 - document.getElementById('product_img').height) / 2 - 10;
	document.getElementById('product_img').style.top = topPos+'px';
	document.getElementById('product_img').style.visibility = 'visible';
}

function hideProductImg()
{
	document.getElementById('product_img').style.visibility = 'hidden';
}