Submit button should disable until submit done

In XForms, upon activation, this control must become unavailable for further activations until the submit process concludes with either an xforms-submit-done or xforms-submit-error event.. This is undoubtedly helpful. Currently, in order to create effect like this, some JavaScript codes need to be written. (I've written that before)

No? Did you even double post because you have clicked the submit button twice? In fact, my sister has an experience of buying two cinema tickets because she had clicked the button twice. X-)