code: public void setOnKeyDown(String onKeyDown) {
          _theadTag.registerAttribute(AbstractHtmlState.ATTR_JAVASCRIPT, HtmlConstants.ONKEYDOWN, onKeyDown);
      }
docs: Sets the onKeyDown JavaScript event for the HTML thead tag.
  
  @param onKeyDown the onKeyDown event.
  @jsptagref.attributedescription The onKeyDown JavaScript event for the HTML thead tag.
  @jsptagref.attributesyntaxvalue <i>string_onKeyDown</i>
  @netui:attribute required="false" rtexprvalue="true" description="The onKeyDown JavaScript event for the HTML thead tag."