Quick url parameter appending

appendParam.js

function appendParam(url, param){
    var parts = url.split(/\?([^#]*)#?/);
    var host = parts.shift();
    var hash = parts.pop();
    var params = parts == 0 ? [] : parts.join('?').split('&');
    params.push(param);
    return host + '?' + params.join('&') + ((hash == null || hash == 0) ? '' : ('#' + hash));
};

http://example.com:80/docs/books/tutorial/index.html?name=networking#DOWNLOADING

The other options:
https://gist.github.com/jlong/2428561
http://blog.stevenlevithan.com/archives/parseuri
https://github.com/medialize/URI.js

function appendParam(url, param){
var parts = url.split(/?([^#]*)#?/);
var host = parts.shift();
var hash = parts.pop();
var params = parts == 0? [] : parts.join('?').split('&');
params.push(param);
return host + '?' + params.join('&') + ((hash == null || hash == 0) ? '' : ('#' + hash));
}