User:Aude/hidecolumns.js

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Documentation for this user script can be added at User:Aude/hidecolumns. This user script seems to have an accompanying .css page at User:Aude/hidecolumns.css.

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function collapseColumn() {
        tables = $('[class*=hidecol]');
        $.each(tables, function() {
                colIndex = $(this).attr('class').match(/hidecol(\d+)/)[1];
                rows = $(this).find('tr');
                $.each(rows, function() {
                        cells = $(this).children();
                        i = 0;
                        $.each(cells, function() {
                                if (i == (colIndex - 1)) {
                                        $(this).css('display', 'none');
                                }
                                i++;
                        });
                });
        });
}

addOnloadHook( collapseColumn );