title: GWT and JSNI add Javascript button into HTML panel
body: <p>I create a simple Javascript file containing a simple button.</p>
  
  <pre><code>function testfuncion() {
      document.write('&lt;input type="button" name="hello" value="hello"&gt;');
  }
  </code></pre>
  
  <p>Then I created a HTML panel in gwt.</p>
  
  <pre><code>HTML panelHtmlTry = new HTML();
  </code></pre>
  
  <p>How can put the Javascript button into the HTML panel?</p>
  
  <p>In this experiment I can't create the button in gwt but only put a Javascript object into the gwt panel.</p>
  
  <p>PS: i can use html panel or horizzontal panel. My objective is put a javascript button on each GWT panel and show it</p>