CSS help to Stylise a button

Hi i need some help to stylize a link to make it look like a button and a bit more user friendly.

Could i please have some CSS help to stylize this button to make it have a green background and when hover/selected it turns white with red text in the same way that the "Next Month>>" is stylized ? screenshot - http://take.ms/qEpx1

Domain - http://tinyurl.com/hj6cdb9

Support Access is open for the next 5 days.

Please dont post any brand related information/ screenshots or domain links as i have had issues with google caching this information and linking it to their google searches of my site ... very bad for brand... please use temporary image upload / tiny url / pastebin etc to mask this information.

Thanks

Tom