get Browser & Version

function getBrowser () {
  var arr = navigator.userAgent.match(/(MSIE|rv|Chrome|firefox|opera|safari)[\s:\/]?(\d+)/);
  var type= {
    MSIE: "ie",
    rv: "ie",
    Chrome: "chrome",
    firefox: "firefox",
    opera: "opera",
    safari: "safari"
  };
  var result =  {
    browser: type[arr[1]],
    version: arr[2]
  };
  return result;
};