Implement a Stack computer in Javascript (JSFiddle). This is a simple computer that keeps a stack, when a number is entered it goes onto the top of the stack. When an operation is entered, the previous 2 numbers are operated on by the operation.

For example:

2 [enter] 2

5 [enter] 5 2

* [enter] * 5 2 -> collapses to 10

would leave at 10 at the top of the stack.

The program should use a simple input box, either a text field or prompt and display the contents of the Stack.