Reset Bootstrap dateTimePicker options depending on Select tag value?

    <div class="form-group">
        <label> * Training package</label>
        <select name="trainingpackage" class="form-control" id="packageselector">
            <option value="default">-- Select --</option>
            <option value="visionunique">Vision Unique</option>
            <option value="visionenterprise">Vision Enterprise</option>
            <option value="mtt">MTT</option>
            <option value="makro">Makro</option>
            <option value="jobcosting">Job Costing</option>
        </select>
    </div>
</div>

<div class="col-md-6">
    <div class="form-group" id="choosedate">
        <label for="dtp_input2" class=" control-label">* Date Picking</label>
        <div class="input-group date form_date" data-date="" data-date-format="dd MM yyyy" data-link-field="dtp_input2" data-link-format="yyyy-mm-dd" >
            <input id="datepicker" class="form-control" size="16" type="text" value="" name="date" readonly>
            <span class="input-group-addon"><span class="glyphicon glyphicon-remove"></span></span>
            <span class="input-group-addon"><span class="glyphicon glyphicon-calendar"></span></span>
        </div>
        <input type="hidden" id="dtp_input2" value="" /><br/>
    </div>
</div>


```javascript
$(document).ready(function(){               
    $("#packageselector").change(function(){

        var packagename = $("#packageselector").find(":selected").val();


        if (packagename == "visionunique")
            {

                $('.form_date').datetimepicker({
                    language:  'en',
                    weekStart: 1,
                    todayBtn:  1,
                    autoclose: 1,
                    todayHighlight: 1,
                    startView: 2,
                    minView: 2,
                    forceParse: 0,
                    daysOfWeekDisabled:[0,2,3,4,5,6]
                });


                $("#choosedate *").show();
            }
        else if(packagename == "visionenterprise")
            {

                $('.form_date').datetimepicker({
                    language:  'en',
                    weekStart: 1,
                    todayBtn:  1,
                    autoclose: 1,
                    todayHighlight: 1,
                    startView: 2,
                    minView: 2,
                    forceParse: 0,
                    daysOfWeekDisabled:[0,1,2,4,6]
                });

                $("#choosedate *").show();
            }
        else if(packagename == "mtt" || packagename == "makro" || packagename == "jobcosting")
            {

                $('.form_date').datetimepicker({
                    language:  'en',
                    weekStart: 1,
                    todayBtn:  1,
                    autoclose: 1,
                    todayHighlight: 1,
                    startView: 2,
                    minView: 2,
                    forceParse: 0,
                    daysOfWeekDisabled:[0,1,3,5,6]
                });

                $("#choosedate *").show();
            }

    });
});