Several articles have appeared recently touting a concept knownas contingency design. In a nutshell, this consists of providingassistance when your visitors do the unexpected or the blatantlywrong thing. This adds an extra level of professionalism to yoursite, which can lead to more return visitors or in the case ofan e-commerce site, more sales.Some examples of contingency design are described below.Error pages: error - This is one of the most importantcontingencies to cover. It is wise to spe...

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