parse a querystring in javascript

parseQueryString.js

function parseQueryString(queryString) {
  queryString = queryString.substring(1)
  var params = {},
    queries,
    temp,
    i,
    l
  // Split into key/value pairs
  queries = queryString.split('&')
  // Convert the array of strings into an object
  for (i = 0, l = queries.length; i < l; i++) {
    temp = queries[i].split('=')
    params[temp[0]] = temp[1]
  }
  return params
}

function parsedQueryStringToString(params) {
  var arr = []
  for (var key in params) {
    if (params.hasOwnProperty(key)) {
      arr.push(key + '=' + params[key])
    }
  }
  return arr.join('&')
}