layui radio manual selection failure

     var radio_types = document.getElementsByName ( "radio_type" );
      for ( var I = 0; I <radio_types.length; I ++ ) {
           IF (radio_types [I] == .Value _type) { 
              $ ( "#" + radio_types [I ] .id) .prop ( "the checked", to true );
               // do not add the following code line does not work above 
              layui.use ([ 'form', 'Layer'], function () {
                   var form = layui. form; 
                  form.render (); 
               }); 
             BREAK ; 
          } 
     }