scroll box with button for terms and condition

I need to put scroll box with a button for Terms and condition. The button will be enabled only after the user scrolls down the scroll 开发者_StackOverflow中文版box to ensure that the user has completly read the terms and conditions.

So put the button at the end of the Terms and Conditions.

this can be done by handling the scroll events through javascript

Have a floating div at the bottom of the terms page. Have a mouse over event which will enable the accept button. Not exactly sure if you have a doubt..