webBrowser如何设置checkbox的值？急！

Question

<ul>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".1"/>.1</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".2"/>.2</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".3"/>.3</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".4"/>.4</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".5"/>.5</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".6"/>.6</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".7"/>.7</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".8"/>.8</li>
                                            <li><input name="ttt" id="ttt" type="checkbox"  value=".9"/>.9</li>
                                        </ul>name和id都一样的，只是value不一样，如果设置指定value的checkbox值？谢谢！

Answer 1

HtmlElementCollection eles= webBrowser1.Document.GetElementsByTagName("INPUT");
  HtmlElementCollection ids=eles.GetElementsByName("id");
  ids[2].SetAttribute("checked", "checked");