Get url parameters

getSearchParameters.js

function get(key) {
	var searchParams = {},
		search = window.location.search.substring(1); // substring to remove the ?

	if (search) {
		search = search.split('&');
		for (var i in search) {
			if (search.hasOwnProperty(i) && i !== '') {
				var pair = search[i].split('=');
				pair[0] = decodeURIComponent(pair[0]);
				pair[1] = decodeURIComponent(pair[1]);
				searchParams[pair[0]] = pair[1];
			}
		}
	}

	if (key) {
		return searchParams[key];
	}

	return searchParams;
}

getUrlparameters.js

function getUrlParameters() {
	var values = window.location.search.replace('?', '').split('&'),
		urlParameters = {},
		valLen = values.length;

	for (var i = 0; i < valLen; i = i + 1) {
		var pair = values[i].split('=');
		if (decodeURIComponent(pair[0]).indexOf('[]') !== -1) {
			var key = decodeURIComponent(pair[0]);
			key = key.replace('[]', '');
			if (!urlParameters[key]) {
				urlParameters[key] = [];
			}
			urlParameters[key].push(decodeURIComponent(pair[1]));
		} else {
			// Normal value.
			urlParameters[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
		}
	}
	return urlParameters;
};