function MyGubaBlocks( blockId ) {
   this._blocks = new Object();

   this.addBlock = function( blockId, blockObj ) {
      this._blocks[ blockId ] = blockObj;
   }

   this.find = function( blockId ) {
      return this._blocks[ blockId ];
   }

   this.draw = function( blockId ) {
      if ( this._blocks[ blockId ] != null ) {
         this._blocks[ blockId ].draw();
      }
   }
}