As your form is
not the only way to post data to a given webpage, it is vital that server side validation remains. However, the
more validation that can be done before the user has to wait for the full page to refresh the better. There is
nothing more frustrating than to click the submit button, wait 10 seconds and then find out that you didn??™t
format your telephone number correctly!
Form Helpers: Autocompletion and drop down lists
Forms are generally complicated and anything that helps the user to complete one is welcome. Form field autocompletion
is so useful that all the major web browsers offer this feature to remember what you have typed
into a given field. Ajax applications take this idea one step further and enable the user to fill in text fields
correctly all the time. Any form drop down list of options that has too many choices in it is a candidate for
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replacing with a text field that is auto-complete enabled. Examples would include choosing your country when
completing your address.
Form field auto-completion is also useful when the user should either supply a new value or use an
existing one.
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