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Default value in a field

This code is used to show a default value in the text field of a form.
When the user clicks inside the field, the default text disappears and he can enter his own value. If the user does not enter anything, and when the field loses focus, the default text is shown back in the field.

This is often used to show any guidelines to the user, like what to enter in the field.

Example:

Password: <input type="text" name="password" size="15" value="min. 6 chars" onFocus="if (value == 'min. 6 chars') {value=''}" onBlur="if (value== '') {value='min. 6 chars'}">

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