function loadDisplay(){
	var firstLi=document.getElementById("valveNav");
	var liTagA=firstLi.getElementsByTagName("a");
	for (var j=0;j<liTagA.length;j++)
	{
		liTagA[j].style.background="none";
	}
	var liH4=firstLi.getElementsByTagName("li");
	liH4[0].style.display="block";
	liH4[0].style.background="url(/images/collapse.gif) no-repeat left center";
	liH4[1].style.display="none";
	liH4[0].onclick=function()
	{
		showLi(this);
	}
	for (var i=2;i<liH4.length ;i++ )
	{
		if (liH4[i].childNodes[0].childNodes[0].nodeValue!=liH4[i-2].childNodes[0].childNodes[0].nodeValue)
		{
			liH4[i].style.display="block";
			liH4[i].style.background="url(/images/collapse.gif) no-repeat left center";
			liH4[i].style.cursor="hand";
			liH4[i].onclick=function()
			{
				showLi(this);
			}
		}else
		{
			liH4[i].style.display="none";
		}
	}
}
addLoadEvent(loadDisplay);

function showLi(whichLi){
	if (whichLi.nextSibling.style.display!="block")
	{
		whichLi.style.background="url(/images/expand.gif) no-repeat left center";
		var thisParent=whichLi.parentNode;
		var liAll=thisParent.getElementsByTagName("li");
		for (var i=0;i<liAll.length ;i++ )
		{
			if (liAll[i].childNodes[0].childNodes[0].nodeValue==whichLi.childNodes[0].childNodes[0].nodeValue)
			{
				liAll[i+1].style.display="block";
			}
		}
	}else
	{
		whichLi.style.background="url(/images/collapse.gif) no-repeat left center";
		var thisParent=whichLi.parentNode;
		var liAll=thisParent.getElementsByTagName("li");
		for (var i=0;i<liAll.length ;i++ )
		{
			if (liAll[i].childNodes[0].childNodes[0].nodeValue==whichLi.childNodes[0].childNodes[0].nodeValue)
			{
				liAll[i+1].style.display="none";
			}
		}
	}
}