title: create custom widgets
body: <p>How can I create a widget from the Javascript. For example I need to create a simple button or table . I have some thirdaparty
  javascripts which draw tables. Now if I want to create GWT widget by using those javascript what should I do first?
  How other frameworks like GWTExt,SmartGWT, are using custom Widgets? Are they starting from the scratch or They reuse the
  GWT widget functionality? Like if I want to create one table in my own style, do I need to inherit GWT Table?can anybody
  give one example or sample code how to create a widget from the javascript? If my questions are wrong please excuse me.</p>
  
  <p>example:</p>
  
  <p>Mytable table = new Mytable(2,3). then it should draw  my own table with 2 columns and 3 rows</p>