attempt at a javascript object

function group(group){
    this.group = group;
    this.deleted = new array();
    this.added = new array();
    this.returnGroup = returnGroup;
    function returnGroup(){
        return this.group;
    }
    this.pushDeleted = pushDeleted;
    function pushDeleted(deleted){
        this.deleted.push(deleted);
    }
    this.removeDeleted = removeDeleted;
    function removeDeleted(deleted){
        this.deleted.splice(dualHeadedSearch(this.deleted, deleted),1);
    }
    this.returnDeleted = removeDeleted;
    function returnDeleted(){
        return this.deleted;
    }
    this.pushAdded = pushAdded;
    function pushAdded(added){
        this.added.push(added);
    }
    this.removeAdded = removeAdded;
    function removeAdded(added){
        this.added.splice(dualHeadedSearch(this.added, added),1);
    }
    this.returnAdded = removeAdded;
    function returnAdded(){
        return this.added;
    }
}