function Is() {
var agent;
var sfHover;
agent = navigator.userAgent.toLowerCase();
this.mac = (agent.indexOf("mac")!=-1);
this.safari = (this.mac && (agent.indexOf("safari")!=-1));
}
var is = new Is();
if (is.safari) {
document.write('<style type="text/css">')
document.write('#nav li ul ul {margin: -31px 0 0 -140px;}')
document.write('</style>')
}

sfHover = function() {
	var sfEls = document.getElementById("nav");
	if(!sfEls) return;
	sfEls = sfEls.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);