Self-written hashchange navigation

I know libraries exist for this, but I still wanted to write something of my own, using jQuery and http://benalman.com/projects/jquery-hashchange-plugin/

"nav.js"

Code:

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function hashToLink(hash) { //Converts the hash into a regular page, including GET attributes
        args = "";
        hash = hash.substring(1).split("/");
        base = hash[0];
        for(i = 1; i < hash.length; i++) {
                args = args + (i == 1 ? "?" : "&") + hash[i];
        }
        return base +".php"+ args;
}

function loadPage(page) {
        $(".main-content").fadeTo(400, 0, function () {
                $.get("pages/"+ page, function(data) {
                        $(".main-content").html(data);
                }).fail(function() {
                        $(".main-content").html("Could not load 'pages/"+ page +"'.");
                });
                $(".main-content").fadeTo(400, 1);
        });
}

$(document).ready(function() {
        $(window).hashchange(function() {
                loadPage(hashToLink(location.hash));
        });
        loadPage(window.location.hash != "" ? hashToLink(window.location.hash) : "home.php"); //Load selected/default page
});

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I basically have it take a #page/opt=1/optex=2 format and put that into page.php?opt=1&optex=2 and so on.

Any criticisms/advice? Thanks