function startPage (whichTool,pageType,whichPage) {
  if (pageType=='overview') {
       top.list.location.href='overview_list.html';
       top.banner.location.href='banner.html';
       top.idxAnchor=whichTool;
  }

  if (pageType=='howto') {
       top.list.location.href='/cgi-bin/help/key_topics?' + whichTool + '&' + whichPage;
       top.banner.location.href='banner_howto.html';
  }
  if (pageType=='example') {
       top.list.location.href='/cgi-bin/help/examples?' + whichTool + '&' + whichPage;
       top.banner.location.href='banner_examples.html';
  }
}