Google searches for "tablesorter" return tablesorter.com, but display a "This site may be hacked" notification which links to https://support.google.com/websearch/answer/190597?p=ws_hacked&hl=en&sa=X&ved=0ahUKEwj7p_io3pXbAhUH64MKHR9FDuUQpwgIPzAB&visit_id=1-636624658706898115-2118333790&rd=1 . Either this is a false positive on Google's part, or the site may have been compromised. Either way, downloading Javascript from it and putting it on your site is probably a bad idea until this is sorted out.
Google searches for "tablesorter" return tablesorter.com, but display a "This site may be hacked" notification which links to https://support.google.com/websearch/answer/190597?p=ws_hacked&hl=en&sa=X&ved=0ahUKEwj7p_io3pXbAhUH64MKHR9FDuUQpwgIPzAB&visit_id=1-636624658706898115-2118333790&rd=1 . Either this is a false positive on Google's part, or the site may have been compromised. Either way, downloading Javascript from it and putting it on your site is probably a bad idea until this is sorted out.