add legacy support of checkbox, add documents for cookie/lgres/request

index.html

@@ -8,6 +8,7 @@
   <title>UI Lib</title>
   <script type="module" src="/main.js"></script>
   <script src="/dist/ui.min.js"></script>
+  <script src="/dist/utility.min.js"></script>
 </head>
 
 <body>