function MyGubaBlock( blockId ) {
   this._blockId = blockId;
   this._items = new Array();
   this._output = "";

   this.addItem = function( fileId, itemObj ) {
      this._items[ this._items.length ] = itemObj;
   }

   this.draw = function() {
      if ( this._output == '' ) {
         for ( var i = 0; i < this._items.length; i++ ) {
            this._output += this._items[ i ].draw();
         }
      }
      document.getElementById( this._blockId + '_div' ).innerHTML = this._output;
   }
}