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