How to get the longest text in Html document using Jquery or javascript : Could someone help on the my issue.

I am having an HTML document like below,
  

    <div id="customdiv">
    <p>AAAAAA AAAAA AAAAA AAAAA AAAAA AAAA</p>
    <p>AAAAAA</p>
    <p>AAAAAA</p>
    </div>

I need output like:
Largest value is:AAAAAA AAAAA AAAAA AAAAA AAAAA AAAA
Length:37