$(function () {
    var name = getUrlVars()["page"];
    $("#nav a[name*=" + name + "]").addClass("active");
});

// Read a page's GET URL variables and return them as an associative array.
function getUrlVars() {
    var vars = [], hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    for (var i = 0; i < hashes.length; i++) {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}