function toggle(id) {   
        var state = document.getElementById(id).style.display;   
            if (state == 'block') {   
                document.getElementById(id).style.display = 'block';   
            } else {   
                document.getElementById(id).style.display = 'none';   
            }   
        }

function Toggle(node)
{
	// Unfold the branch if it isn't visible
	if (node.nextSibling.style.display == 'block')
	{
		// Change the image (if there is an image)
		if (node.childNodes.length > 0)
		{
			if (node.childNodes.item(0).nodeName == "IMG")
			{
				node.childNodes.item(0).src = "../images/plus.png";
			}
		}

		node.nextSibling.style.display = 'none';
	}
	// Collapse the branch if it IS visible
	else
	{
		// Change the image (if there is an image)
		if (node.childNodes.length > 0)
		{
			if (node.childNodes.item(0).nodeName == "IMG")
			{
				node.childNodes.item(0).src = "../images/minus.png";
			}
		}

		node.nextSibling.style.display = 'block';
	}

}