CSS和Javascript简单复习资料

                                                                                    使用test()方法，符合条件返回true

                                                                      replace() 替换第一次出现的字符

                                                                      split() 返回一个数组

                                                                      substring() 截位置 / substr() 截长度

                                   Math对象：   Math对象是静态对象，需要用Math.方法名()调用

                                   Date对象：   new Date() 构造方法

                                                        getYear() / getMonth()+1 / getDate() / getDay/ getTime()