function parseAgent(agent) {

  var browserlist = [
    ["MSIE 5.0", "IE5"],
    ["MSIE 6.0", "IE6"],
    ["MSIE 10.0", "IE10"],
    ["Trident/7.0; rv:11.0", "IE11"],
    ["QupZilla", "QupZilla"],
    ["Iceweasel", "Iceweasel"],
    ["Firefox", "Mozilla Firefox"],
    ["Chrome", "Google Chrome"],
    ["Chromium", "Chromium"],
    ["Opera", "Opera"],
    ["OPR", "Opera"],
    ["UCBrowser", "UCBrowser"],
    ["Safari", "Apple Safari"],
    ["Konqueror", "Konqueror"],
    ["libwww", "Lynx"],
    ["Links", "Links"],
    ["w3m", "W3M"],
    ["Otter", "Otter"],
    ["Midori", "Midori"],
    ["Origyn Web Browser", "Origyn Web Browser"],
    ["OWB", "Origyn Web Browser"],
    ["IBrowse", "IBrowse"],
    ["Amiga-AWeb", "Amiga AWeb"]
  ];
  
  var oslist = [
    ["Windows 98", "Windows 98"],
    ["Windows NT 5.1", "Windows XP"],
    ["Windows NT 6.1", "Windows 7"],
    ["Windows NT 6.2", "Windows 8"],
    ["J2ME/MIDP", "Java"],
    ["Mac OS X", "Mac OS X"],
    ["AmigaOS 3.1", "AmigaOS 3.1"],
    ["AmigaOS 4.0", "AmigaOS 4.0"],
    ["AmigaOS4.0", "AmigaOS 4.0"],
    ["AROS", "AROS"],
    ["MorphOS", "MorphOS"],
    ["iPhone", "Apple iOS"],
    ["FreeBSD", "FreeBSD"],
    ["Ubuntu", "Ubuntu"],
    ["Debian", "Debian"],
    ["Android", "Android"],
    ["Linux", "Linux"]
  ];
  
  var archlist = [
    ["i386", "x86"],
    ["i686", "x86"],
    ["AMD64", "x86_64"],
    ["WOW64", "x86_64"],
    ["x86_64", "x86_64"],
    ["ARM", "ARM"],
    ["PPC", "PowerPC"],
    ["PowerPC", "PowerPC"],
    ["68K", "Motorola 68K"]
  ];
  
  var exceptlist = [
    ["Mozilla/5.0 (Linux; U; Android 4.2.2; hu-hu; Galaxy Nexus Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30", ["Android WebKit", "Android", "unknown"]],
    ["Mozilla/5.0 (Linux; U; Android 2.3.6; hu-hu; GT-S5660 Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1", ["Android WebKit", "Android", "unknown"]],
    ["Mozilla/5.0 (Linux; U; Android 4.2.2; hu-hu; Galaxy Nexus Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30", ["Android WebKit", "Android", "unknown"]],
    ["Mozilla/5.0 (Linux; U; Android 2.3.6; hu-hu; GT-I9070P Build/GINGERBREAD) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1", ["Android WebKit", "Android", "unknown"]],
    ["Mozilla/5.0 (Linux; U; Android 4.1.1; hu-hu; ALCATEL ONE TOUCH 5020X Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.1 Mobile Safari/534.30", ["Android WebKit", "Android", "unknown"]],
    ["Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0; ARM; Touch; WPDesktop)", ["IE10", "WP8", "ARM"]],
    
  ];
  
  for (var i = 0; i < exceptlist.length; i++) {
    if (agent == exceptlist[i][0]) {
      return exceptlist[i][1];
    }
  }
  

  var res = ["unknown", "unknown", "unknown"];	// [browser, os, arch]
  
  for (var i = 0; i < browserlist.length; i++) {
    if (agent.indexOf(browserlist[i][0]) > -1) {
      res[0] = browserlist[i][1];
      break;
    }
  }

  for (var i = 0; i < oslist.length; i++) {
    if (agent.indexOf(oslist[i][0]) > -1) {
      res[1] = oslist[i][1];
      break;
    }
  }
  
  for (var i = 0; i < archlist.length; i++) {
    if (agent.indexOf(archlist[i][0]) > -1) {
      res[2] = archlist[i][1];
      break;
    }
  }

  return res;
}