如何处理这样的字符串,各位大侠帮帮忙!!!!!

如何在下面字符串中,找到type="submit"的name和id????<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head><title> 无标题页</title></head><body>    <form name="form1" method="post" action="ShowControls.aspx" id="form1"><div><input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKMTU2NjA4NTYzOA9kFgICAw9kFgICBw8QDxYGHg1EYXRhVGV4dEZpZWxkBQtjb250cm9sVGV4dB4ORGF0YVZhbHVlRmllbGQFCWNvbnRyb2xJRB4LXyFEYXRhQm91bmRnZBAVAwdCdXR0b24xB0J1dHRvbjIHQnV0dG9uMxUDB0J1dHRvbjEHQnV0dG9uMgdCdXR0b24zFCsDA2dnZ2RkGAEFHl9fQ29udHJvbHNSZXF1aXJlUG9zdEJhY2tLZXlfXxYEBQ9DaGVja0JveExpc3QxJDAFD0NoZWNrQm94TGlzdDEkMQUPQ2hlY2tCb3hMaXN0MSQyBQ9DaGVja0JveExpc3QxJDJSaSE9kzfQjx2rV6tF7fCmzSiYUg==" /></div>    <div>        <input type="submit" name="Button1" value="Button1" id="Button1" />        <input type="submit" name="Button2" value="Button2" id="Button2" />        <input type="submit" name="Button3" value="Button3" id="Button3" /><br />        <br />        <table id="CheckBoxList1" border="0"> <tr> <td><input id="CheckBoxList1_0" type="checkbox" name="CheckBoxList1$0" /><label for="CheckBoxList1_0">Button1</label></td> </tr><tr> <td><input id="CheckBoxList1_1" type="checkbox" name="CheckBoxList1$1" /><label for="CheckBoxList1_1">Button2</label></td> </tr><tr> <td><input id="CheckBoxList1_2" type="checkbox" name="CheckBoxList1$2" /><label for="CheckBoxList1_2">Button3</label></td> </tr></table></div>    <div> <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWBwLyl+aDCgKM54rGBgK7q7GGCALWlM+bAgLww6rJCgKLrcjeBAK68e6eBvcljz2Bg9cCeVNSsw6UQVD8Did8" /></div></form></body></html>