jsp - submitting form when using ValueChangeListener -

i have value change listener selectonemenu,which drop down. in our application when change value of drop down, new form values gets loaded calling action listener.

its works using following code in change listener

public void methodname(valuechangeevent e){     phaseid phaseid = event.getphaseid();     if (phaseid.equals(phaseid.any_phase)) {         event.setphaseid(phaseid.update_model_values);         event.queue();      }    .............. } 

but before loading new form data new drop down value. need submit old drop down value's form , perform validations , persist values in data base old drop down value.

is there way submit form server old drop down value?.

any appreciated. if question not clear try make more clear. in advance

the valuechangeevent has 2 functions retreiving data getoldvalue() , getnewvalue().

so if want retreive previous value, use getoldvalue().