forms - jQuery submit not working in Firefox -

this jquery working submit form in chrome , safari, not firefox:

// submit form long there no errors                 if (invalidfields.length == 0 || typeof invalidfields === 'undefined') {                     $("form.sd_form").submit();                 } 

it checks custom validation errors, , should submit form if there none (which does, except in firefox).

the function wrapped in

(function($) {     $(document).ready(function() { 

i'm not sure try!

edit: here pastebin of entire .js file. i'm stuck here! http://pastebin.com/unkpu1th