说明：  请给Array本地对象增加一个原型方法，它的用途是删除数组条目中重复的条 目(可能有多个)，返回值是一个仅包含被删除的重复条目的新数组。 利用正则表达式，解析形如(2003-12-05)的短日期，得到该日期的年月日。 并利用年月日构造Date对象 要求用户在文本框中输入用户名，提交时，若文本框为空，则取消提交利用复选框让用户选择其爱好，输出用户所选的内容；利用单选钮让用户选择其性别，输出用户所选的内容；利用隐藏控件，设计判断用户输入的验证码
(Please add a local object to the Array prototype method, which uses an array of entries is to delete duplicate entries (there may be multiple), the return value is one that contains only duplicate entries deleted new array. The use of regular expressions, analytical form (2003-12-05) short date, month, day to get that date. And use the date Date object constructor requires the user to enter a user name in the text box to submit, if the text box is empty, uncommit use checkboxes allow users to choose their hobbies, outputs the user selected content use of radio button allows the user to select their gender, outputs the user selected content use hidden controls, designed to determine the user input verification code)