Change the Position

To change the position of the drop-down list for the wijcombobox, use the dropDownListPosition option, like the following:
<script id="scriptInit" type="text/javascript">
        $(document).ready(function () {
            var testArray = ["c++", "java", "php", "coldfusion", "javascript", "asp", "ruby", "python", "c", "scala", "groovy", "haskell", "perl"];
            var myReader = new wijarrayreader([{ name: 'label' }, { name: 'value' }, { name: 'selected', defaultValue: false}]);
            var datasourceOptions = {
                reader: myReader,
                data: testArray
            };
            var datasource = new wijdatasource({
                reader: myReader,
                data: testArray
            });
            $("#tags").wijcombobox({
                data: datasource,
                width: 150
            });
            $('.position').bind('change', changed);
        });
        function changed() {
            $("#tags").wijcombobox('option', 'dropDownListPosition', {
                my: $('#my_horizontal').val() + ' ' + $('#my_vertical').val(),
                at: $('#at_horizontal').val() + ' ' + $('#at_vertical').val(),
                offset: $('#offset').val(),
                collision: $("#collision_horizontal").val() + ' ' + $("#collision_vertical").val()
            });
        }
    </script>
<div class="main demo">
    <!-- Begin demo markup -->
    <div>
        <input id="tags" />
    </div>
    <!-- End demo markup -->
    <div class="demo-options">
        <!-- Begin options markup -->
        <div class="option-row">
            <label for="my_horizontal">
                Dropdown list:</label>
            <select id="my_horizontal" class="position">
                <option value="left">left</option>
                <option value="center">center</option>
                <option value="right">right</option>
            </select>
            <select id="my_vertical" class="position">
                <option value="top">top</option>
                <option value="middle">center</option>
                <option value="bottom">bottom</option>
            </select>
        </div>
        <div class="option-row">
            <label for="at_horizontal">
                Aligns to textbox:</label>
            <select id="at_horizontal" class="position">
                <option value="left">left</option>
                <option value="center">center</option>
                <option value="right">right</option>
            </select>
            <select id="at_vertical" class="position">
                <option value="top">top</option>
                <option value="middle">center</option>
                <option value="bottom">bottom</option>
            </select>
        </div>
        <div class="option-row">
            <label for="offset">
                With offset:</label>
            <input onblur="changed()" id="offset" type="text" size="15" />
        </div>
        <div class="option-row">
            <label for="collision_horizontal">
                Horizontal collision detection:</label>
            <select id="collision_horizontal">
                <option value="flip">flip</option>
                <option value="fit">fit</option>
                <option value="none">none</option>
            </select>
            <label for="collision_vertical">
                Vertical collision detection:</label>
            <select id="collision_vertical">
                <option value="flip">flip</option>
                <option value="fit">fit</option>
                <option value="none">none</option>
            </select>
        </div>
        <!-- End options markup -->
    </div>
</div>