function movePicture()
{
	var offset = document.body.scrollTop + 100;
	document.getElementById('containertd').style.backgroundPosition = 'center ' + offset;
}

function calculateOffset(objItem)
{
	var totalOffset = 0;
	var lastOffset = 0;

	if (document.getElementById)
	{
		var item = objItem;
		do
		{
			if (item.tagName != 'BODY')
			{
				lastOffset = item.offsetLeft;
				totalOffset += lastOffset;
				item = eval('item.offsetParent');
			}
			else
			{
				//totalOffset -= lastOffset;
				item = null;
			}

		} while (item != null);
	}
	else if (document.all)
	{
		var item = eval('objItem');
		do
		{
			if (item.tagName != 'BODY')
			{
				lastOffset = eval('item.offsetLeft');
				totalOffset += lastOffset;
				item = eval('item.offsetParent');
			}
			else
			{
				totalOffset -= lastOffset;
				item = null;
			}
		} while (item != null);
	}

	
	return totalOffset;
}

function calculateOffsetTop(objItem)
{
	var totalOffset = 0;
	var lastOffset = 0;

	if (document.getElementById)
	{
		var item = objItem;
		do
		{
			if (item.tagName != 'BODY')
			{
				lastOffset = item.offsetTop;
				totalOffset += lastOffset;
				item = eval('item.offsetParent');
			}
			else
			{
				//totalOffset -= lastOffset;
				item = null;
			}

		} while (item != null);
	}
	else if (document.all)
	{
		var item = eval('objItem');
		do
		{
			if (item.tagName != 'BODY')
			{
				lastOffset = eval('item.offsetTop');
				totalOffset += lastOffset;
				item = eval('item.offsetParent');
			}
			else
			{
				//totalOffset -= lastOffset;
				item = null;
			}
		} while (item != null);
	}

	
	return totalOffset;
}

function showPopup(strPopupId, strParagraph)
{
	var paragraph = document.getElementById(strParagraph);
	var top = calculateOffsetTop(paragraph);
	var left = calculateOffset(paragraph);
	var popup = document.getElementById(strPopupId);
	popup.style.top = (top-200);
	popup.style.left = (left+20);
	popup.style.visibility = 'visible';
}

function hidePopup(strPopupId)
{
	var popup = document.getElementById(strPopupId);
	popup.style.visibility = 'hidden';
}