Walmart on Friday announced that its 2013 Black Friday campaign has been a smashing success, with the store delivering “the biggest shopping day of the season,” even though not all its online customers were happy after Walmart’s website experienced some snafus. The retail store revealed that over 1 million customers took advantage of the One-Hour Guarantee promotion offered on 21 products this year, while the company said it processed more than 10 million transactions on Thursday from 6 p.m. to 10 p.m., and its website registered nearly 400 million page views on Thanksgiving Day. In total, more than 22 million customers did their Black Friday shopping at Walmart. Walmart’s top sellers include big screen TVs and laptops, with the retailer singling