Hi there, another simple (I hope) task.

The thing is to allow clicking only once and only on one of the rectangles. That is, after clicking on one (any of the) rectangle, no more of them should be available for clicking. I guess it could be done somehow substituting <article> tags for <input> fields, in the example, and disabling all rest <input> fields after clicking on one of them. Here is the example:


Is there a simple way to get that provided the markup as it is right now?

Thanks very much in advance guys,