- JavaScript Version
function updateUrlParameter(uri, key, value) {
// remove the hash part before operating on the uri
var i = uri.indexOf('#');
var hash = i === -1 ? '' : uri.substr(i);
uri = i === -1 ? uri : uri.substr(0, i);
var re = new RegExp("([?&])" + key + "=.*?(&|$)", "i");