sfHover = function() {
	var sfEls = document.getElementById("top_nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" hover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

/* Menu rollovers */
function hiLiteCell(obj, newClass)
{
	prevClass = obj.className;
	obj.className = newClass;
}

function normaliseCell(obj)
{
	obj.className = prevClass;
}

/* External links */
function externalLinks()
{   
	if (!document.getElementsByTagName) return;   

	var anchors = document.getElementsByTagName("a");   

	for (var i=0; i<anchors.length; i++)
	{   
   		var anchor = anchors[i];
   		   
   		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")   
     		anchor.target = "_blank";   
	}   
}
   
window.onload = externalLinks;