options.put("onUpdate", new JavascriptBuilder.JavascriptFunction(
"function(element) { wicketAjaxGet('" + this.getCallbackUrl()
+ "&' + Sortable.serialize(element)); }"));
JavascriptBuilder builder = new JavascriptBuilder();
builder.addLine("new Sortable('" + getComponent().getMarkupId() + "', ");
builder.addOptions(options);
builder.addLine(");");
Response response = RequestCycle.get().getResponse();
response.write(builder.buildScriptTagString());