function checkforminfo(){
  if (document.frm_searchinfo.kwd.value==""){
      alert("input key please!");
      document.frm_searchinfo.kwd.focus();
      return false;
      }
  else
      return true;
}document.write ('<table width=150 border=0 cellpadding=0 cellspacing=0 align=center><form name=frm_searchinfo action=/sub/ty.dll method=post onSubmit=javascript:return checkforminfo();><tr><td width=63% align=right><br><input name=kwd class=box style=width:100px; size=26 border:1px solid #666666; background-color:#ffffff><br><select name=typ id=typ><option value=info>infomation</option><option value=product>production</option></select><input name=yhy type=hidden value=1></td></tr><tr><td align=right><input name=smb src=/images/search.jpg height=23 width=63 type=image></td></tr></form></table>');