正規表現を使用せずに JavaScript でクエリ文字列の操作を強化するにはどうすればよいですか?

<code class="javascript">function RemoveParameterFromUrl(url, parameter) {

    if (typeof parameter == "undefined" || parameter == null || parameter == "")
        throw new Error("parameter is required");

    url = url.replace(new RegExp("\b" + parameter + "=[^&amp;;]+[&amp;;]?", "gi"), "");
    // remove any leftover crud
    url = url.replace(/[&amp;;]$/, "");

    return url;
}</code>

<code class="javascript">function removeURLParameter(url, parameter) {
    // Prefer using l.search if working with a location/link object
    var urlparts = url.split('?');
    if (urlparts.length >= 2) {

        var prefix = encodeURIComponent(parameter) + '=';
        var pars = urlparts[1].split(/[&amp;;]/g);

        // Iterate in reverse to avoid destroying array elements
        for (var i = pars.length; i-- > 0;) {
            if (pars[i].lastIndexOf(prefix, 0) !== -1) {
                pars.splice(i, 1);
            }
        }

        return urlparts[0] + (pars.length > 0 ? '?' + pars.join('&amp;') : '');
    }
    return url;
}</code>