PowerURL: my own simple incomplete js object to handle url manipulation. I know it needs some work.

PowerURL.js

function PowerURL(url) {
    var powerURL = this;
    powerURL.protocol = "";
    powerURL.site = "";
    powerURL.path = [];
    powerURL.get = {};

    if(typeof url === 'string') {
        powerURL.parse(url);
    }
}

PowerURL.prototype.parse = function(url) {
    var powerURL = this;
    urlArray = url.split("://");
    if (urlArray.length === 2) {
        powerURL.protocol = urlArray[0];
        url = urlArray[1];
    } else {
        powerURL.protocol = 'http';
        url = urlArray[0];
    }

    urlArray = url.split('?');

    url = urlArray[0];

    powerURL.path = url.split("/");
    powerURL.site = powerURL.path.shift();

    if (urlArray.length > 1) {
        getString = urlArray[1];

        getArray = getString.split("&");
        for (var i = 0; i < getArray.length; i++) {
            item = getArray[i].split("=");
            powerURL.get[item[0]] = item[1];
        }
    }
    return powerURL;
}

PowerURL.prototype.add_get = function(key, value) {
    this.get[key] = value;
    return this;
}

PowerURL.prototype.remove_get = function(key) {
    delete this.get[key]
    return this;
}

PowerURL.prototype.set_site = function(value) {
    this.site = value
    return this;
}

PowerURL.prototype.set_path = function(value) {
    this.path = value.split("/");
    return this;
}

PowerURL.prototype.set_protocol = function(value) {
    this.protocol = value;
    return this;
}



PowerURL.prototype.get_url = function () {
    var powerURL = this;
    newURL = powerURL.protocol;
    newURL += "://";
    newURL += powerURL.site;
    newURL += "/";
    newURL += powerURL.path.join("/");
    first = true;
    for (var property in powerURL.get) {
        if (powerURL.get.hasOwnProperty(property)) {
            if (first) {
                newURL += "?";
                first = false;
            } else {
                newURL += "&";
            }
            newURL += property + "=" + powerURL.get[property];
            // do stuff
        }
    }
    return newURL;
}