Angular JS Multiple selection

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C#

JScript.NET

jQuery

Dear All,
currently i am working with Angular JS.
Now, i have 2 multiple selection list. Now my requirement is when i select any (or Multiple) row or record from first list then 2nd list will be populate based on first list selected rows.

I have fire even on ng-blur for first list , now the problem is it got populate 2nd
list but first list select gone as well as above event fires all the time .

Can any one help me on this?

My code is bellow

<select class="multipleRow" ng-model="Team.skillSetIdAll" ng-options="u.skillcode as u.Skillname for u in skillSetCollection | filter: { deptId : Team.departmentId}" multiple="" ng-blur="PopulateUsers()">
                                <option value=" ">
                                Select</option>
                            </select>

<select class="multipleRow" ng-model="Team.auditorIdAll" ng-options="u.UserId as u.UserLogon for u in auditorsCollection" multiple="">
                               <option value="">Select</option>
                           </select>