// Hash Functions
// Thanks to mojavelinux.com

function Hash() {
  this.length = 0;                                   
  this.items = new Array();                           
  for (var i = 0; i < arguments.length; i += 2) {
    if (typeof(arguments[i + 1]) != 'undefined') {
      this.items[arguments[i]] = arguments[i + 1];
      this.length++;
    }
  }
   
  this.removeItem = function(in_key)   {          
    var tmp_value;
    if (typeof(this.items[in_key]) != 'undefined') {
      this.length--;
      var tmp_value = this.items[in_key];
      delete this.items[in_key];
    }
    return tmp_value;
  }

  this.getItem = function(in_key) { 
    return this.items[in_key];
  }

  this.setItem = function(in_key, in_value) {
    if (typeof(in_value) != 'undefined') {
      if (typeof(this.items[in_key]) == 'undefined') {
        this.length++;
      }

      this.items[in_key] = in_value;
    }
    return in_value;
  }

  this.hasItem = function(in_key)
  {
    return typeof(this.items[in_key]) != 'undefined';
  }
}