HTML form with multiple hidden control elements of the same name

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The browsers are OK with it. However, how the application library parses it may vary.

Programs are supposed to group identically named items together. While the HTML specification doesn’t explicitly say this, it is implicitly stated in the documentation on checkboxes:

Several checkboxes in a form may share
the same control name. Thus, for
example, checkboxes allow users to
select several values for the same
property.

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