Enable/Disable fileupload control with Javascript

Hi,
I have file upload and  Custom Radio button(with Images)  in the page
Requirement:
When the page load, both the file upload control and Custom Radio Buttons has to be enable. when I click on the Custom Radio buttons ,the File Upload will be disabled, when I click on the File Upload ,the Custom Radio buttons will be disabled.
Can any tell me how to do this with JavaScript?
Once check the screenshot 

It's very Urgent to get the file