$(document).ready(function(){
    /* Check if url contains 'index.html'. If not then add it to the url. */
    var curr_url = ($.url.attr("path").search(/index.html/i) >= 0) ? $.url.attr("path") : $.url.attr("path") + "index.html";
	var parent_url = "";
	var notthere = 0;
	
	while (notthere < 1) {
		//If topmost URL, then parent and current url is the same, otherwise generate parent url.
		parent_url = (curr_url == $("div#leftnav ul a:first").attr("href")) ? curr_url : curr_url.substr(0, curr_url.substr(0, curr_url.lastIndexOf("/")).lastIndexOf("/")+1) + "index.html";
		//If the current url doesn't exist in the leftnav, then set it equal to its parent
		if ($("div#leftnav ul").find("li a[href^='"+curr_url+"']").length == 0) {
			curr_url = parent_url;
		}
		//set variable to length (occurences of the current url)
		notthere = $("div#leftnav ul").find("li a[href^='"+curr_url+"']").length;
	}
	
    //Adding classes to relevant <li> tags so the correct items are highlighted
    var curr_url_el = $("a[href='" + curr_url + "']");
    var parent_count = curr_url_el.parents("li").length;
    
    curr_url_el.parents("li:eq(0):not([class='main'])").addClass("active");
    if (parent_count == 2) {
        curr_url_el.parents("li:eq(1):not([class='main'])").addClass("activechild");
    }
});