$(document).ready(function(){
$("#menu li:not(.active)").fadeTo("fast", 0.6); // This sets the opacity of the menu to fade down to 60% when the page loads
$("#menu li:not(.active)").hover(function(){
$(this).fadeTo("slow", 1.0); // This should set the opacity to 40% on hover
},function(){
$(this).fadeTo("slow", 0.6); // This should set the opacity back to 100% on mouseout
});
});