get param from URL (rails friendly)

getParam.js

function getParam(name){
  var pathRegex   = new RegExp(name + '\/([^\/]+)'),
      searchRegex = new RegExp(name + '=([^&]+)'),
      match;

  match = (window.location.pathname.match(pathRegex) || window.location.search.match(searchRegex));
  if (!match) return false;
  return match[1];
}