If a contact is found, then the HTML select list where the contacts are displayed on the AddressBook.html page is cleared by setting the length of the select list to zero.
如果找到一个联系人，那么AddressBook .html页面上用于显示联系人的html选择列表将被清除，这是通过将选择列表的长度设置为0来实现的。
If a contact is found, then the HTML select list where the contacts are displayed on the AddressBook.html page is cleared by setting the length of the select list to zero.
如果找到一个联系人，那么AddressBook .html页面上用于显示联系人的html选择列表将被清除，这是通过将选择列表的长度设置为0来实现的。
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