Yahoo's 1Q earnings surge while revenue sags

Yahoo's Internet advertising revenue crumbled further during the first three months of the year and overshadowed a surge in the company's earnings.The results released Tuesday seemed to dim some of the aura surrounding Yahoo CEO Marissa Mayer, who was lured away from a top job at Google Inc. nine months ago to engineer a turnaround at a company that has been struggling for years.There have been si...