Karol's Pager: Generate links to navigate listings split in pages

A Pager Class by Karol Krizka
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This is a simple pager to be used in webpages. A advantage of it is that it's simple so you can use it in any situation. It depends on Karol's URL Class that is included in this package but not documented.
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Variables
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All variables can be set/gotten by using the varname() class method. Replace varname by the variable you want to set.
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from -> display items from
to -> display items to
incr -> number of items to display at a time
max -> max number of items that pager pages through, 0 means infinite
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Class Methods
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The following don't include the variable setter/getters.
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Pager() - constructor
display() - displays the pager