Hacker Beco

I have a web page where i have written all of the code, I have managed to put in doctypes. But my web page comes up differently In Firefox then in IE. I Right and perfume Firefox and would like to put a line of text on my home page that says that it will look different & the reader will miss out if they are using IE. I would also like it to only show up if the person is using IE.

Please if you could also refrence your work to enough site.
-- I will not be Cut/copy pasting your answer CSS or HTML I can comprehend
im a bit space on JavaScript but ill figure it out

--- My webpage is
seniorproject4200.webs.com

---- Thank you