How to use html editor in our web page?

Hi all,
I have one web page, in it i want to get the content from user for some description…
I used earlier as a text area field…
Now i want to put simple HTML tags included editor.(as like we enter this description in sitepoint).
How to include this…
Suggested good one to include in my web page…

This should rather be in Javascript.

Try Tiny-MCE

You can use FCKeditor aslo