lements.toolbox.selectedIndex =
          toolbox ? 1: 0;

        match = location.search.match(/side=([^&]+)/);

        var side = match ? match[1] : 'start';

        document.forms.options.elements.side.value = side;

        workspace = Blockly.inject('blocklyDiv', {
          comments: false,
          disable: false,
          collapse: false,
          media: '../media/',
          readOnly: false,
          rtl: rtl,
          scrollbars: true,
          toolbox: toolbox,
          trashcan: true,