Wanna get into Red Hot Chili Pepper Dave Navarro’s pants? Point your browser to http://www.streammedia.com/auctionline, where the pierced and tattooed one’s worn leather will be among hundreds of items on the virtual auction block. Sponsored by the music industry’s T.J. Martell Foundation (which has raised more than $100 million for charity since 1976), the online silent auction will offer up an eclectic mix of rock and pop-culture memorabilia, including the harmonica Alanis Morissette played on her recent tour and an original script signed by the entire Seinfeld cast. Epic Records’ Steve Rennie, who’s helping online, says the annual fund-raiser’s move to the Net will make it ”more of a fan-based event,” with items expected to fetch from $50 to several thousand dollars. Proceeds will benefit leukemia, cancer, and AIDS research, with E-mailed bids accepted from May 1 to May 8.