Possible Duplicate:
Convert form data to JS object with jQuery
I need to login my users to external website, but there's a problem, this website processes only json-data POST values, ex. {"username":"user","password":"12345"}
<form action="https://external.com/login" method="POST">
<input name="username" value="user" />
<input name="password" value="12345" />
<input type="submit" />
</form>
This above only sends average key=value data, how can I use to POST json-data to external https?