code: function initializeForm() {
      form = new Form( 'form.or:eq(0)', {
          modelStr: modelStr
      }, {
          arcGis: {
              basemaps: [ 'streets', 'topo', 'satellite', 'osm' ],
              webMapId: 'f2e9b762544945f390ca4ac3671cfa72',
              hasZ: true
          },
          'clearIrrelevantImmediately': true
      } );
      // for debugging
      window.form = form;
      //initialize form and check for load errors
      loadErrors = form.init();
      if ( loadErrors.length > 0 ) {
          window.alert( 'loadErrors: ' + loadErrors.join( ', ' ) );
      }
  }
docs: initialize the form