function $(o) {return document.getElementById(o);}
Function.prototype.bind = function(thisObj, var_args) {
  var self = this;
  var staticArgs = Array.prototype.splice.call(arguments, 1, arguments.length);

  return function() {
    var args = staticArgs.concat();
    for (var i = 0; i < arguments.length; i++) {
      args.push(arguments[i]);
    }
    return self.apply(thisObj, args);
  };
}

function createElement(type, className, parent) {
  var el = document.createElement(type);
  el.className = className;
  if (parent) parent.appendChild(el);
  return el;
}

function min(a, b) { return (a < b) ? a : b; }
if (!('console' in window)) {
  window.console = [];
  window.console.log = function() {}
}

function setText(node, text) {
  node.innerHTML = '';
  node.appendChild(document.createTextNode(text));
}

function addEventListener(node, evt, listener) {
  if (node.addEventListener)
    node.addEventListener(evt, listener, false);
  else if (node.attachEvent)
    node.attachEvent('on' + evt, listener);
}

// Browser detection script from http://www.quirksmode.org/js/detect.html
var BrowserDetect = {
  init: function () {
    this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
    this.version = this.searchVersion(navigator.userAgent)
      || this.searchVersion(navigator.appVersion)
      || "an unknown version";
    this.OS = this.searchString(this.dataOS) || "an unknown OS";
  },
  searchString: function (data) {
    for (var i=0;i<data.length;i++) {
      var dataString = data[i].string;
      var dataProp = data[i].prop;
      this.versionSearchString = data[i].versionSearch || data[i].identity;
      if (dataString) {
        if (dataString.indexOf(data[i].subString) != -1)
          return data[i].identity;
      }
      else if (dataProp)
        return data[i].identity;
    }
  },
  searchVersion: function (dataString) {
    var index = dataString.indexOf(this.versionSearchString);
    if (index == -1) return;
    return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
  },
  dataBrowser: [
    {
      string: navigator.userAgent,
      subString: "Chrome",
      identity: "Chrome"
    },
    {   string: navigator.userAgent,
      subString: "OmniWeb",
      versionSearch: "OmniWeb/",
      identity: "OmniWeb"
    },
    {
      string: navigator.vendor,
      subString: "Apple",
      identity: "Safari",
      versionSearch: "Version"
    },
    {
      prop: window.opera,
      identity: "Opera"
    },
    {
      string: navigator.vendor,
      subString: "iCab",
      identity: "iCab"
    },
    {
      string: navigator.vendor,
      subString: "KDE",
      identity: "Konqueror"
    },
    {
      string: navigator.userAgent,
      subString: "Firefox",
      identity: "Firefox"
    },
    {
      string: navigator.vendor,
      subString: "Camino",
      identity: "Camino"
    },
    {   // for newer Netscapes (6+)
      string: navigator.userAgent,
      subString: "Netscape",
      identity: "Netscape"
    },
    {
      string: navigator.userAgent,
      subString: "MSIE",
      identity: "Explorer",
      versionSearch: "MSIE"
    },
    {
      string: navigator.userAgent,
      subString: "Gecko",
      identity: "Mozilla",
      versionSearch: "rv"
    },
    {     // for older Netscapes (4-)
      string: navigator.userAgent,
      subString: "Mozilla",
      identity: "Netscape",
      versionSearch: "Mozilla"
    }
  ],
  dataOS : [
    {
      string: navigator.platform,
      subString: "Win",
      identity: "Windows"
    },
    {
      string: navigator.platform,
      subString: "Mac",
      identity: "Mac"
    },
    {
         string: navigator.userAgent,
         subString: "iPhone",
         identity: "iPhone/iPod"
      },
    {
      string: navigator.platform,
      subString: "Linux",
      identity: "Linux"
    }
  ]

};
BrowserDetect.init();

// HAMLET HAMLET HAMLET
function isValidBrowser() {
  var browser = BrowserDetect.browser;
  var version = BrowserDetect.version;

  return (
    (browser == 'Chrome' && version >= 6) ||
    (browser == 'Firefox' && version >= 3.6) ||
    ("FileReader" in self && "ondrag" in document)
  );
}