Online retailers just won’t quit. And why should they? According to the Commerce Department, sales at e-commerce websites rose 3.5% sequentially in the first quarter, reaching a record $80 billion. Year-over-year online sales rose 14.5%. IBD’s Retail-Internet group was perched high in IBD’s 197 industry group rankings at No. 5 as of Thursday’s paper, up slightly from No. 6 six weeks ago.