Css Floated Button Jumps Out Of The Wrapper Division

The problem i am facing with floated div is i have written this piece of code: CodePiece1 but whenever i try add the class ;right' ,that makes it float to the right, to the button

Solution 1:

Add overflow: hidden to the #buttonWrapper.

JSFiddle: http://jsfiddle.net/9Ecq2/8/

Solution 2:

Add the style:

overflow:hidden;

to #buttonWrapper or #updateWrapper