//Big thanks to vkontakte.ru. If you read this and angry... call me

//
//  Useful utils
//
function rand(mi, ma) { return Math.random() * (ma - mi + 1) + mi; }
function irand(mi, ma) { return Math.floor(rand(mi, ma)); }
function isFunction(obj) {return Object.prototype.toString.call(obj) === '[object Function]'; }
function isArray(obj) { return Object.prototype.toString.call(obj) === '[object Array]'; }
function isEmpty(o) { if(Object.prototype.toString.call(o) !== '[object Object]') {return false;} for(var i in o){ if(o.hasOwnProperty(i)){return false;} } return true; }
function vkNow() { return +new Date; }
function trim(text) { return (text || '').replace(/^\s+|\s+$/g, ''); }
function stripHTML(text) { return text ? text.replace(/<(?:.|\s)*?>/g, '') : ''; }
function escapeRE(s) { return s ? s.replace(/[.*+?^${}()|[\]\/\\]/g, '\\$0') : ''; }
function intval(value) {
  if (value === true) return 1;
  return parseInt(value) || 0;
}
function floatval(value) {
  if (value === true) return 1;
  return parseFloat(value) || 0;
}
function positive(value) {
  value = intval(value);
  return value < 0 ? 0 : value;
}

function winToUtf(text) {
  var m, i, j, code;
  m = text.match(/&#[0-9]{2}[0-9]*;/gi);
  for (j in m) {
    var val = '' + m[j]; // buggy IE6
    code = intval(val.substr(2, val.length - 3));
    if (code >= 32 && ('&#' + code + ';' == val)) { // buggy IE6
      text = text.replace(val, String.fromCharCode(code));
    }
  }
  text = text.replace(/&quot;/gi, '"').replace(/&amp;/gi, '&').replace(/&lt;/gi, '<').replace(/&gt;/gi, '>');
  return text;
}

//
//  Arrays, objects
//

function each(object, callback) {
  var name, i = 0, length = object.length;

  if (length === undefined) {
    for (name in object)
      if (callback.call(object[name], name, object[name]) === false)
        break;
  } else {
    for (var value = object[0];
      i < length && callback.call(value, i, value) !== false;
        value = object[++i]) {}
  }

  return object;
}

function indexOf(arr, value, from) {
  for (var i = from || 0; i < arr.length; i++) {
    if (arr[i] == value) return i;
  }
  return -1;
}
function inArray(value, arr) {
  return indexOf(arr, value) != -1;
}
function clone(obj) {
  var newObj = isArray(obj) ? [] : {};
  for (var i in obj) {
    newObj[i] = obj[i];
  }
  return newObj;
}