I want to get an access_token according to this documentation http://dev.twitter.com/doc/post/oauth/request_token. I use javascript.

$.ajax({

    url: http://api.twitter.com/oauth/request_token,

    type: POST,

    contentType: json,

    data: {

        oauth_consumer_key: DFwQqCnOTaYVbZQdBFqpR,

        oauth_signature_method: HMAC-SHA1,

        oauth_timestamp: parseInt((new Date()).getTime() / 1000),

        oauth_nonce: R + parseInt((new Date()).getTime() / 1000),

        oauth_version: 1.0

    },

    success: function (data) {

        debugger;

    },

    error: function (a, b, c) {

        debugger;

    }

});

But it does not work at all. Always return error, never success.