//Thanks to Gabriel Farrell

//adds class="active" to active nav item
function makeActive() {
	var url = window.location.href;
	var navList = document.getElementById("nav");
	var navLinks = navList.getElementsByTagName("a");
	for (var i = 0; i < navLinks.length; i++) {
	    var navLink = navLinks[i];
	    if (navLink.href == url) {
	        navLink.className = "active";
	    }
	}
}

function init() {
    makeActive();
}
window.onload = init;