Callbacks in Xtech checkout

gistfile1.js

// Vars that needs to be set in order to work with pagseguro checkout process
var checkoutCallbacks = $.Callbacks();
var checkoutNoSubmit = false;

$('#onepage_checkoutform').submit(function(e){

    // This calls the callback from ex. pagseguro.
    checkoutCallbacks.fire('checkout');

    // If the checkoutNoSubmit variable is set to false go and submit the form, otherwise prevent the form submit.
    if (checkoutNoSubmit === false) {
        // If the checkoutNoSubmit was set to false and pagseguro sets the creditCartToken input we will submit the form.
        return true;
    }else{
        // If the checkoutNoSubmit is true we do not submit and wait for the pagseguro response in order to set the creditcard token.
        e.preventDefault();
        return false;
    }
});