[JS] Parse Query string

parse_query.js

function parse_query(name, url) {
  if (!url) 
    url = window.location.href
  name = name.replace(/[\[\]]/g, "\\$&")
  var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)")
  var results = regex.exec(url)
  if (!results) return null
  if (!results[2]) return ''
  return decodeURIComponent(results[2].replace(/\+/g, " "));
}