Insert paragraph tags around selectable text

Hello,

I am building a mini WYSIWYG editor for an admin site. Most functions are done in Javascript using document.execCommand. I have noticed many built in parameters for this command which have helped alot.

One of these parameters is document.execCommand("InsertParagraph"), when clicked puts in <p></p>. Then the user types their text and it puts <p></p> around the text. However, if existing text is selected, it overwrites the text with the tags.

ie: "This paragraph" becomes "<p></p>"

To make a long story short, I am looking for a built in for document.execCommand or a custom javascript function that will do the following:

- When text is selected, it puts <p></p> around the selected text. For example, a person can paste a bunch of unformatted text into the editor then hightlight each section and hit a Paragraph button and it will insert a paragraph around each section of text.

For an example of what I am using, please see:
http://msconline.maconstate.edu//tutorials/JSDHTML/JSDHTML12/editor.htm

Thanks...