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 (document.all) { // Load sfHover only in IE; other browsers don't need it
if (window.attachEvent) window.attachEvent("onload", sfHover);
else window.onload = sfHover; // Mac IE5 needs this
}

function swap(name, image) {
       document.images[name].src = image;
}

function show(name) {
      document.getElementById('image1').style.display="none";
      document.getElementById('image2').style.display="none";
      document.getElementById('image3').style.display="none";
      document.getElementById('image4').style.display="none";
      document.getElementById('image5').style.display="none";
      document.getElementById(name).style.display="block";
}