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  • js正则实现用户输入银行卡号的控制及格式化

    //js正则实现用户输入银行卡号的控制及格式化
    <script language="javascript" type="text/javascript">
    function formatBankNo (BankNo){
        if (BankNo.value == "") return;
        var account = new String (BankNo.value);
        account = account.substring(0,22); /*帐号的总数, 包括空格在内 */
        if (account.match (".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}") == null){
            /* 对照格式 */
            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++){    /* 可将以下空格改为-,效果也不错 */
                    if (i == 4) account = account + " "; /* 帐号第四位数后加空格 */
                    if (i == 8) account = account + " "; /* 帐号第八位数后加空格 */
                    if (i == 12) account = account + " ";/* 帐号第十二位后数后加空格 */
                    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>
    
    <input type="text" value="" size="25" onkeyup="formatBankNo(this)" onkeydown="formatBankNo(this)" name="account" id="account">
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  • 原文地址:https://www.cnblogs.com/mssql8/p/3983396.html
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