function checkforminfo(){
document.frm_searchinfo.action="/info/search.dll"
  if (document.frm_searchinfo.kwd.value==""){
      alert("请输入关键字!");
      document.frm_searchinfo.kwd.focus();
      return false;
      }
  else
      return true;
}
document.write ('<table width=400 height=20 align=right border=0><form name="frm_searchinfo" action="" method="post" onSubmit="javascript:return checkforminfo();"><tr><td width=240></font><span style="font-size:12px; color:#ffffff;"><b>关键字：</b></span>&nbsp;&nbsp;<input name=kwd class=box style="width:160px;color:#ffffff"><input name=yhy type=hidden><font style="color:#000000;font-size:12px;"></font></td><td width=50><input name=smb src=/images/search.jpg type=image></td><td>&nbsp;<a href=/info/search.dll><font color=#ffffff>高级搜索</font></a>&nbsp;&nbsp;&nbsp;&nbsp;</td></tr></form></table>');