How to find someone online to collaborate on a joint paper? I would like to know where (a website) I can find anyone to publish some joint papers?

I thought such cooperation can be shaped as the following:


We could share some ideas for papers through email or a web tool and ask the opinions about them (in fact if the person is an expert on a field who could transfer his knowledge and experience to me and direct me in the right way would be a plus :) )
I would try to prepare a draft of the paper


Somethings that I wish the other one can guide or help me on are:


I don't know much journals to publish a paper in, in this regard one could send the article to the journal
My English is not perfect and the other one could modify the paper or guide me for some modification


Update:
it seems the way I wrote it, the relation could be like two keen researchers with common field of interest or like an expert who guide a PhD student.
The things you seek from a coauthor (advice on journal selection and English usage) are not in themselves a sufficient basis for coauthorship, but rather just being thanked in the acknowledgments.  A coauthor on a scholarly publication needs to make a substantial intellectual contribution by being seriously involved in the research.

I do not know of any website designed for academics seeking coauthors, and I wouldn't recommend approaching it from the perspective of "I'd like to publish a paper and am looking for someone to help clean it up and submit it."  That's not likely to find you the sort of intellectual connection that would lead to genuine coauthors.  Instead, you may get no responses, or you may get unscrupulous coauthors who just want an easy way to get their names on papers.  (And even if that doesn't bother you, think about it this way: if someone's willing to put their name on your ideas, could you really trust them not to add some plagiarized text to the paper?)

Instead, research collaboration should come before coauthorship, so the question becomes how to find collaborators.  That can come in all sorts of ways: you can talk with people at conferences about common interests, you can write to people whose papers are on similar topics, etc.  Sometimes collaborators meet through participation in websites where they discover a common interest.  (They aren't necessarily collaborating on the website, but they may start to correspond after interacting through the website, and the correspondence may turn into a collaboration.)  Once you are actively working on research with someone, writing a paper together will come naturally.