detect changes in forms

hello there,

 

i wondering if give me advice on best way following:

 

i have few components on page (each have own form) - have 1 submit button submit changes of forms..

what i'd disable submit button until there's been @ least 1 change - somewhere in forms...

i guess need kind of listener check changes ? there "best way" ?

 

i use bindingutils class listen each item on every form , direct same class enable/disable action.. best way ?

 

at moment tried first option - when fields initialised they  lready call function fields filled in - need activate bindingutils bindsetter @ different moment somehow...

 

or should maybe use change property of each item on each form ??

 

thnx in advance time ;-)

i use change event each item in form. check items , if 1 has user input, enable button.

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