//js正则实现用户输入银行卡号的控制及格式化

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 <script language="javascript" type="text/javascript"> function formatBankNo (BankNo){ if (BankNo.value == "") return; var account = new String (BankNo.value); account = account.substring(0,22); if (account.match (".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}") == null){ if (account.match (".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}|" + ".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}|" + ".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}|" + ".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}") == null){ var accountNumeric = accountChar = "", i; for (i=0;i<account.length;i++){ accountChar = account.substr (i,1); if (!isNaN (accountChar) && (accountChar != " ")) accountNumeric = accountNumeric + accountChar; } account = ""; for (i=0;i<accountNumeric.length;i++){ if (i == 4) account = account + " "; if (i == 8) account = account + " "; if (i == 12) account = account + " "; account = account + accountNumeric.substr (i,1) } } } else { account = " " + account.substring (1,5) + " " + account.substring (6,10) + " " + account.substring (14,18) + "-" + account.substring(18,25); } if (account != BankNo.value) BankNo.value = account; } </script> ? 1 <input type="text" value="" size="25" onkeyup="formatBankNo(this)" onkeydown="formatBankNo(this)" name="account" id="account">

以上所述是小编给大家介绍的JS使用正则控制用户输入银行卡号及格式化，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！

原文链接：http://blog.csdn.net/generon/article/details/72453716