How to reenable event.preventDefault?

I have a web page which I have prevented the default action on all submit buttons, however I would like to re-enable default submit action on a button how can I do this?

I am currently preventing the default action using the following:

$("form").bind("submit", function(e){
e.preventDefault();
});

I have successfully done this using the following:

$(document).ready(function(){
$("form:not('#press')").bind("submit", function(e){
e.preventDefault();
});

But can I do this dynamically when the button is clicked?

You would have to unbind the event and either rebind to a separate event that does not preventDefault or just call the default event yourself later in the method after unbinding. There is no magical event.cancelled=false;

As requested

 $('form').submit( function(ev){
        
         ev.preventDefault();
  
         //later you decide you want to submit
         $(this).unbind('submit').submit()

  });

Either you do what redsquare proposes with this code:

function preventDefault(e) {
    e.preventDefault();
}
$("form").bind("submit", preventDefault);

// later, now switching back
$("form#foo").unbind("submit", preventDefault);

Or you assign a form attribute whenever submission is allowed. Something like this:

function preventDefault(e) {
    if (event.currentTarget.allowDefault) {
        return;
    }
    e.preventDefault();
}
$("form").bind("submit", preventDefault);

// later, now allowing submissions on the form
$("form#foo").get(0).allowDefault = true;

function(e){ e.preventDefault();

and its opposite

function(e){ return true; }

cheers!

$('form').submit( function(e){

     e.preventDefault();

     //later you decide you want to submit
     $(this).trigger('submit');     or     $(this).trigger('anyEvent');

With async actions (timers, ajax) you can override the property isDefaultPrevented like this:

$('a').click(function(evt){
  e.preventDefault();

  // in async handler (ajax/timer) do these actions:
  setTimeout(function(){
    // override prevented flag to prevent jquery from discarding event
    evt.isDefaultPrevented = function(){ return false; }
    // retrigger with the exactly same event data
    $(this).trigger(evt);
  }, 1000);
}

This is most complete way of retriggering the event with the exactly same data.

I had a similar problem recently. I had a form and PHP function that to be run once the form is submitted. However, I needed to run a javascript first.

        // This variable is used in order to determine if we already did our js fun
        var window.alreadyClicked = "NO"
        $("form:not('#press')").bind("submit", function(e){
            // Check if we already run js part
            if(window.alreadyClicked == "NO"){
                // Prevent page refresh
                e.preventDefault();
                // Change variable value so next time we submit the form the js wont run
                window.alreadyClicked = "YES"
                // Here is your actual js you need to run before doing the php part
                xxxxxxxxxx

                // Submit the form again but since we changed the value of our variable js wont be run and page can reload (and php can do whatever you told it to)
                $("form:not('#press')").submit()
            } 
        });

You can re-activate the actions by adding

this.delegateEvents();	// Re-activates the events for all the buttons

If you add it to the render function of a backbone js view, then you can use event.preventDefault() as required.