Class[] parms2 = new Class[]{ValueChangeEvent.class};
ExpressionFactory ef = FacesContext.getCurrentInstance().getApplication().getExpressionFactory();
MethodExpression mb = ef.createMethodExpression(FacesContext.getCurrentInstance().getELContext(),
"#{AutoEvalSerUserConfigBean.processMathExprChange}", null, parms2);
MethodExpressionValueChangeListener vcl = new MethodExpressionValueChangeListener(mb);
select2.addValueChangeListener(vcl);
select2.getChildren().add(items2);
select2.setImmediate(true);
//place an ajax support on the selectonemenu field
HtmlAjaxSupport ajaxSupport2 = new HtmlAjaxSupport();