Someone to modify installed Opencart?

Hi.
I have an opencart installation using a two column design and i need someone to modify it.
- fixing browser compatibility issues
- fixing 'log out' , closing session completely when browser is closed.
- adding a couple of html stuff
- adding remove item option (like by clicking an 'x' sign ) to shopping basket on homepage.
- adding a javascript window that shows that service is unavailable if someone uses checkout, out of working hours.
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If someone can finish these in 1 day please contact me with the price.