var nodes = new Array("tech2010", "tech2008");
function shw(x,y)
	{
		if(document.getElementById(x).style.display == "none")
		{
			for (i=0; i < nodes.length; i++)
			{
				document.getElementById(nodes[i]).style.display = "none";
	            document.getElementById(y).innerHTML='(Expand List)';
                document.getElementById(x).parentNode.childNodes[0].title='Expand List';
                document.getElementById(x).parentNode.childNodes[0].className='';
			}
			document.getElementById(x).style.display = "block";
			document.getElementById(y).innerHTML='(Collapse List)';
            document.getElementById(x).parentNode.childNodes[0].title='Collapse List';
            document.getElementById(x).parentNode.childNodes[0].className='collapse';
	}
	else
		{
            document.getElementById(x).style.display = "none";
		    document.getElementById(y).innerHTML='(Expand List)';
            document.getElementById(x).parentNode.childNodes[0].title='Expand List';
            document.getElementById(x).parentNode.childNodes[0].className='expand';
		}
	}