navdeep's blog

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You can copy theme_pager() (http://api.drupal.org/api/function/theme_pager/5) and paste it in your theme's template.php file, then rename it to _pager() or phptemplate_pager() and change its behavior, as either of those versions of the theme_pager() function will be called before the default theme_pager() function found in core.</div>