clearSelection

Clear all selected items:

<div id="listbox" ></div>
<script type="text/javascript">
    $(function () {
        $("#listbox").shieldListBox({
            dataSource: {
			    data: countries
		    },
            textTemplate: "{name}",
            valueTempate: "{id}"
        });
    });

    $("#listbox").swidget().clearSelection(); // clear all selected items

</script>