var locks = [];
  var LOCKTIME_DEFAULT = 1000 * 10;
  function jsynchronized(lockName, lockTime) {
    if (getLock(lockName)) {
      return false;
    } else {
      setLock(lockName, true);
      setTimeout(function () {
        setLock(lockName, false);
      }, lockTime ? lockTime : LOCKTIME_DEFAULT);
      return true;
    }
  }

  /**
  
   * 获得一个锁,如果没有添加这个锁
  
   */
  function getLock(lockName) {
    for (var i = 0; i < locks.length; i++) {
      if (locks[i][0] == lockName) {
        return locks[i][1];
      }
    }
    locks[locks.length] = [lockName, false];
    return false;
  }

  /**
  
   * 设置一个锁,如果没有添加这个锁
  
   */
  function setLock(lockName, lockValue) {
    for (var i = 0; i < locks.length; i++) {
      if (locks[i][0] == lockName) {
        locks[i][1] = lockValue;
        return;
      }
    }
    locks[locks.length] = [lockName, lockValue];
  }

Q.E.D.