크롬, 파이어폭스에서 검색 버튼이 안될경우 채택완료

<!--검색시작-->        <tr>          <td align="right" height="76"><table width="100%" border="0" cellspacing="0" cellpadding="0">            <tr>              <td class="pad_search"><table width="500" border="0" cellspacing="0" cellpadding="0">                <tr>                  <td height="32" class="search_bg"><table width="500" border="0" cellspacing="0" cellpadding="3" >                    <form name="searchFrm" id="searchFrm" onSubmit="return search();">                      <tr>                        <td width="10"></td>                        <td width="115" height="32" align="left">                        <!--Firefox 검색시 검색 안되는 css-->                        <link href="/scripts/jcombox.css" rel="stylesheet" type="text/css" />                         <!--Firefox 검색시 검색 안되는 css-->                        <script type="text/javascript" src="/scripts/jquery-1.4.2.js"></script>                        <script type="text/javascript" src="/scripts/jcombox-1.0b.packed.js"></script>                        <script type="text/javascript" src="/scripts/jquery.easing.1.3.js"></script>                                                  <script type="text/javascript">                            $(function(){                              $('.select15').jcombox({theme: 'default2'});                            });                            function clickMe(txt){ //                              alert("클릭!");                            }                          </script>                          <select class="select15" width="90" name="field">                            <option value="all" <? if($field=="all") echo "selected"; ?> >전체검색</option>                            <option value="lecture" <? if($field=="lecture") echo "selected"; ?> >강좌명</option>                            <option value="name" <? if($field=="name") echo "selected"; ?> >선생님명</option>                            <option value="book" <? if($field=="book") echo "selected"; ?> >교재명</option>                            <option value="board" <? if($field=="board") echo "selected"; ?> >게시물검색</option>                          </select></td>                        <td width="330"><input name="keyword" type="text" class="box" style="width:260px;"  value="" size="300" maxlength="60" /></td>                        <td valign="top"><img src="<?=$gConf['TEMPLATE_URL']?>/image/sear_btn.gif"  border="0" onClick="javascript:search();" style="cursor:pointer;" /></td>                        <!--수정                        <td valign="top"><img src="<?=$gConf['TEMPLATE_URL']?>/image/sear_btn.gif"  border="0" onClick="javascript:search();" style="cursor:hand;" /></td>                        -->                      </tr>                   </form>                  </table></td>                </tr>