function myFunction() {
            var idx = 1;
            var selectItems = Element.extend(parent.window.theSelectionDetailsFrame.document.getElementById("aSelectElement"));
            var opt;
            opt = selectItems.childNodes[selectItems.selectedIndex];
            selectItems.options.length = 1;
            var val;
            val = opt.value;

            <c:forEach var="item" items="${selectionItemForm.selectionItems}">
                <c:set var="itemId" value="${item.id}"/>
                    if(${itemId} != -1) {
                        var displayName = document.getElementsByName("selectionItems[" + (idx-1) + "].displayName")[0];
                        if (displayName) {
                            if (val == ${itemId}) {
                                selectItems.options.appendChild(new Option(displayName.value, ${itemId}, false, true), idx++);
                            }
                            else {
                                selectItems.options.appendChild(new Option(displayName.value, ${itemId}), idx++);
                            }
                        }
                    }
            </c:forEach>
        }