window.onload = function() {
	        var menuID = 'mainNav'; // The ID of your menu
	        var activeClass = 'current'; // The class to add
	
	        var menu = document.getElementById(menuID);
	        var items = menu.getElementsByTagName('a');
	        for( var i = 0; i < items.length; i++ ) {
	            if( items[i].href.replace(/https?:\/\/.*?\//i , '/') ==
	                location.href.replace(/https?:\/\/.*?\//i , '/') ) {
	                items[i].parentNode.className = activeClass;
	                break;
	            }
	        }
	
		};