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经典实用的触发型导航菜单 .sec1 { BORDER-RIGHT: gray 1px solid; BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: #ffffff 1px solid; CURSOR: hand; COLOR: #000000; BORDER- BOTTOM: #ffffff 1px solid; BACKGROUND-COLOR: #eeeeee } .sec2 { BORDER-RIGHT: gray 1px solid; BORDER-TOP: #ffffff 1px solid; FONT-