模拟19位的银行账号，除了数字不能输入其他字符的表单，很有意思！而且应该是有实际价值的！
<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; } function checkBankNo (BankNo) { if (BankNo.value == "") return; if (BankNo.value.match (".[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{7}") == null) { if (BankNo.value.match ("[0-9]{19}") != null) formatBankNo (BankNo) } } function checkEnterForFindListing(e){ var characterCode; if(e && e.which){ e = e; characterCode = e.which ; } else{ e = event; characterCode = e.keyCode; } if(characterCode == 22){ document.forms[getNetuiTagName("findListingForm")].submit(); return false; } else{ return true ; } } </script> <input type="text" value="" size="25" onkeyup="formatBankNo(this)" onkeydown="formatBankNo(this)" name="account" id="account"> 工商银行帐号应该是19位吧
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