CSS和Javascript简单复习资料

                            对象：    location：地址栏对象，可以得到地址栏或者改变网页

                                                        刷新：reload()

                                          event：得到事件源

                                          frames：数组

                                          screen：提供显示器信息

                                          history： go(0 / -1)  / back() /     forward()

                                          navigator：浏览器信息

                                          document：文档信息