Javascript Help

How would you make a page with a javascript function that rolls a dice or two six sided dices a undefined amount of times then displays the average in a seperate box can anyone help me with this?
If someone could pm me or help me with this would be extremly thankful.

 

I know this isn't helping (exactly), but you should be able to follow my code. I made it simple and easy to understand also comes with comments explaining what's going on.

Here's the source to your request: http://lab.jcode.me/assets/js/diceRoll.js

Here is a demo link: http://lab.jcode.me/diceRolling/