detachevent专题
attachEvent、addEventListener、detachEvent、removeEventListener
属于DOMattachEvent、addEventListener添加事件到对象detachEvent、removeEventListener注销对象事件 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt