function getChxObjList() {
     var chx_panel = document.getElementById("tb04");
     var objs = chx_panel.getElementsByTagName("input");
     return objs;
 }
 function isChecked(evt){
  evt=evt?evt:(window.event?window.event:null);
     var eventChxObj = evt.srcElement ? evt.srcElement : evt.target;
     var objs = getChxObjList();
  for (var i = 0; i < objs.length; i++) {
         objs[i].checked = eventChxObj.checked;
  }
 }
 function messageDelete(v) {
  var bools = true;
     var checkedIndex = 0;
     var objs = getChxObjList();
     var idArray="";
     for (var i = 0; i < objs.length; i++) {if (objs[i].checked) {idArray = idArray+objs[i].value+",";checkedIndex++;}}
     if (checkedIndex == 0) {alert("선택해주세요!");bools=false;}
    if (idArray =='on,'){alert("선택해주세요!");bools=false;}
     if(bools){
     form1.action = "<%=request.getContextPath()%>/webMemberAction.do?method=updateMemberAuth&yn="+v+"&idArray="+idArray;
     form1.submit();
    }
 }


<table  id="tb04" cellspacing="0" cellpadding="0" summary="">
<th><input type="checkbox" onclick="isChecked(event)"></input> </th>
                        <th>순번</th>
                        <th>아이디</th>
                        <th>이름</th>
                        <th>단체명</th>
                        <th>등록날짜</th>
                        <th>인증여부</th>
                    </tr> 
<input type="button" value="인증 " onclick="javascript:messageDelete('Y');">&nbsp;&nbsp;<input type="button" value="비인증" onclick="javascript:messageDelete('N');">