title: How to create a rich text editor
body: <p>Hey all i want to know what is the concept behind creating the rich text editor. i mean how to create a rich text editor. I want to learn the implementation.</p>
  
  <p>PS: please donot suggest using YUI or any other built in library. I want to make one my own. </p>
  
  <p>So what's the concept behind?</p>
  
  <p>Thanks :)</p>