[javascript] How to unbind a listener that is calling event.preventDefault() (using jQuery)?

I had a problem where I needed the default action only after some custom action (enable otherwise disabled input fields on a form) had concluded. I wrapped the default action (submit()) into an own, recursive function (dosubmit()).

var prevdef=true;
var dosubmit=function(){
    if(prevdef==true){
        //here we can do something else first//
        prevdef=false;
        dosubmit();
    }
    else{
        $(this).submit();//which was the default action
    }
};

$('input#somebutton').click(function(){dosubmit()});

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