function showHide(vThis)
{
	vParent = vThis.parentNode;
	vSibling = vParent.nextSibling;
	while (vSibling.nodeType==3) {
    	vSibling = vSibling.nextSibling;
  	};

	if(vSibling.style.display == "none")
	{
		vThis.src="../media/divminus.gif";
		vThis.alt = "+";
		vSibling.style.display = "block";
	} else {
		vSibling.style.display = "none";
		vThis.src="../media/divplus.gif";
		vThis.alt = "-";
	}
	return;
}