Jquery Mobile Buttons/Div Alignment at the bottom

Jquery Mobile Buttons/Div Alignment at the bottom

Hello,

I need to align my button at the bottom part of the page. But by default none of the top,bottom attributes is working on button, i tried to wrap button in a <div> and set the position to div, this worked, but the width of the div when given 100% is going out of screen in mobile resolutions. if width is not given but appears small...

Does anybody know how to fix this ?