js模拟银行卡账号输入

 

   <script language="javascript" type="text/javascript"> 
  
 
  function www_zzjs_net (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) 
  
www_zzjs_net (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> 
  
<a href="http://www.zzjs.net/"></a>hr> 
  
只能输入数字，并且每输入4位数字会增加一个 - <br /> 
  
<input type="text" value="" size="25" onkeyup="www_zzjs_net(this)" onkeydown="www_zzjs_net(this)" name="account" id="account">