Excluding certain inputs on serialize

You don’t need the :, because input is an element not a pseudo selector. Secondly you cannot use an object and a text string like that in your selector. You instead need to supply this as the scope argument to $():

$('#ofform').live('submit', function(e) {
    e.preventDefault();
    var serializedReturn = $('input[name!=security]', this).serialize();        
});