click checkbox dynamically and add the email address in list and remove duplicate email address using javascript

File name : contact.jsp

${contactList} have more than one contacts.

1. if checkbox is checked , then it will be added emailList class , if checkbox is unchecked , then email address will be removed from list.
2. remove the duplicate email address from list.
3. eg : kumar@gmail.com , sam@yahoo.com - here in middle of email address put comma
4. finally assign the all email address to parent page id $("#toAddress").

<c:forEach items="${contactList}" var="contact">             
    <cong:td>
        <input type="checkbox" name="selectContact"  id="selectContact" class="emailList" onclick="addEmailinList(${contact.email});"/>
    </cong:td>
    <cong:td>${contact.accountNo}</cong:td>
    <cong:td>${contact.firstName}&nbsp;&nbsp;${contact.lastName}</cong:td>
    <cong:td>${contact.position}</cong:td>
    <cong:td>${contact.email}</cong:td>
    <cong:td>${contact.phone}</cong:td>
    <cong:td>${contact.fax}</cong:td>
</c:forEach>

file name : contact.js

function addEmailinList(ele) {
    var mailList = [];
    $(".emailList:checked").each(function () {
        alert(ele);            //  here i got email address.
        mailList.push(ele);
    });
    parent.$("#toAddress").val($(".emailList").val());
}