sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);
function features(disp)
{
if(disp=="on" || document.getElementById("features").style.display=="none")
{
document.getElementById("features").style.display="block";
}
else
{
document.getElementById("features").style.display="none";
}
}
function notes(disp)
{
if(disp=="on" || document.getElementById("notes").style.display=="none")
{
document.getElementById("notes").style.display="block";
}
else
{
document.getElementById("notes").style.display="none";
}
}