getHashParam(), updateHashParam(), getParam()

getHashParam.js

function getHashParam(name) {
    var regex   = new RegExp("(#)("+name+")(\=)([^#]*)"),
        matches = [];
    matches = regex.exec(window.location.hash);
    if (matches !== null && matches.length > 4 && matches[4] !== null) {
        return matches[4];
    } else {
        return false;
    }
}

function updateHashParam(key, value) {
    var hash = window.location.hash;
    value = encodeURIComponent(value);
    if (!getHashParam(key)) {
        window.location.hash = window.location.hash + '#' + key + '=' + value;
        return true;
    } else {
        var regex   = new RegExp("(#)("+key+")(\=)([^#]*)"),
            matches = [];
        matches = regex.exec(window.location.hash);
        if (matches !== null && matches.length > 0 && matches[0] !== null) {
            window.location.hash = hash.replace(matches[0], '#' + key + '=' + value);
            return true;
        }
    }
    return false;
}

function getParam(name) {
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regexS = "[\\?&]" + name + "=([^&#]*)";
    var regex = new RegExp(regexS);
    var results = regex.exec(window.location.search);
    if(results == null) {
        return "";
    } else {
        return decodeURIComponent(results[1].replace(/\+/g, " "));
    }
}