!!Counter
A simple counter that starts counting at 1 at the top of the page, and each time it is invoked, will increase its value.  
These counters are transient, and relevant to the current page view only - i.e. two persons viewing the same page at the same time get their own counters.

The current counter value is accessible also as a [WikiVariable].  The name of the variable is "counter", or "counter-<name>", if you have defined a counter name.

!Parameters

* __name__ = ''counter name''.  You may define as many counters per page as you want; you just need to separate them with the ''counter name''. This parameter is optional.
* __increment__ = ''value''. (Since 2.8) The amount to increment the counter with, it may be both a positive and a negative value, the default is 1. The parameter is optional.
* __start__ = ''value'' (Since 2.8) The starting value of the count, the default value = 0. This parameter is optional.
* __showResult__ = ''true/false'' (Since 2.8) Can be true or false, and determines if the counter value should be visible on the page, the default is true. This parameter is optional.

!Examples

||Specified value|| Result on page|| Comments
|[[{Counter}], [[{Counter}], [[{Counter}], [[{Counter name='aa'}] |[{Counter}], [{Counter}], [{Counter}], [{Counter name='aa'}] |The value of "counter" at the end is [{$counter}] and the value of "counter-aa" is [{$counter-aa}].
|[[{$counter}], [[{$counter-aa}] |[{$counter}], [{$counter-aa}]|access the counter value via the variable name (without increasing it)
| .[[{Counter showResult=false}]. [[{Counter}]. | .[{Counter showResult=false}].[{Counter}].| the first result(4)  is not visible, the second is visible
| [[{Counter start=15}] [[{Counter}] | [{Counter start=15}] [{Counter}]| set the offset to 15 and start counting
| [[{Counter }] [[{Counter increment=10}] | [{Counter }] [{Counter increment=10}]| the second invocation increases with the specified value of 10
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[JSPWikiPlugins|http://www.jspwiki.org/JSPWikiPlugins]