JavaScript 卡 PAN 校验位 Luhn 验证

发布于 2024-11-04 18:56:16 字数 1381 浏览 0 评论 0原文

我已使用下面链接中的代码来尝试验证信用卡，但是当我在字段中提交错误数据时，我没有收到警报。

我的表格如下：

<form id="myform" method="post" action=""> 

<p>Select credit card:
   <select tabindex="11" id="CardType"> 
      <option value="AmEx">American Express</option> 
    <option value="CarteBlanche">Carte Blanche</option> 
    <option value="DinersClub">Diners Club</option> 
    <option value="Discover">Discover</option> 
    <option value="EnRoute">enRoute</option> 
    <option value="JCB">JCB</option> 
    <option value="Maestro">Maestro</option> 
    <option value="MasterCard">MasterCard</option> 
    <option value="Solo">Solo</option> 
    <option value="Switch">Switch</option> 
    <option value="Visa">Visa</option> 
    <option value="VisaElectron">Visa Electron</option> 
    <option value="LaserCard">Laser</option> 
  </select> 
</p>

<p>
Enter number:
 <input type="text" id="CardNumber" maxlength="24" size="24" />
  <input type="submit" id="submitbutton" onsubmit="Validate(Luhn);" />  
</p> 

</form>

也许我使用了错误的代码？

原文

I've used the code from the link below to try and validate a credit card, however I'm not getting an alert when I submit a the wrong data in the field.

Strip spaces before performing Luhn check

my form is as follows:

<form id="myform" method="post" action=""> 

<p>Select credit card:
   <select tabindex="11" id="CardType"> 
      <option value="AmEx">American Express</option> 
    <option value="CarteBlanche">Carte Blanche</option> 
    <option value="DinersClub">Diners Club</option> 
    <option value="Discover">Discover</option> 
    <option value="EnRoute">enRoute</option> 
    <option value="JCB">JCB</option> 
    <option value="Maestro">Maestro</option> 
    <option value="MasterCard">MasterCard</option> 
    <option value="Solo">Solo</option> 
    <option value="Switch">Switch</option> 
    <option value="Visa">Visa</option> 
    <option value="VisaElectron">Visa Electron</option> 
    <option value="LaserCard">Laser</option> 
  </select> 
</p>

<p>
Enter number:
 <input type="text" id="CardNumber" maxlength="24" size="24" />
  <input type="submit" id="submitbutton" onsubmit="Validate(Luhn);" />  
</p> 

</form>

Maybe I'm using the wrong code?

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可可 2024-11-11 18:56:16

将 onsubmit="Validate(Luhn);" 移动

到表单标记并传递表单，

如下所示 - 请注意，我传递了表单并从表单中找到了数字。
我还移动了测试并返回 false/return true

http://jsfiddle.net/mplungjan/VqXss/

function Validate(theForm) {
  var Luhn = theForm.CardNumber.value;
  var LuhnDigit = parseInt(Luhn.substring(Luhn.length-1,Luhn.length));
  var LuhnLess = Luhn.substring(0,Luhn.length-1);
  if (Calculate(LuhnLess)!=parseInt(LuhnDigit)) {
    alert("\n\nYou have mis-typed your card number! \nPlease check and correct.\n\n")   
    return false;
  }
  return true;
}
</script>
</head>
<body>
<form id="myform" method="post" action="" onsubmit="return Validate(this)">

move onsubmit="Validate(Luhn);"

to the form tag and pass the form

Like this - note I pass the form and find the number from the form.
I also moved the test and return false/return true around

http://jsfiddle.net/mplungjan/VqXss/

function Validate(theForm) {
  var Luhn = theForm.CardNumber.value;
  var LuhnDigit = parseInt(Luhn.substring(Luhn.length-1,Luhn.length));
  var LuhnLess = Luhn.substring(0,Luhn.length-1);
  if (Calculate(LuhnLess)!=parseInt(LuhnDigit)) {
    alert("\n\nYou have mis-typed your card number! \nPlease check and correct.\n\n")   
    return false;
  }
  return true;
}
</script>
</head>
<body>
<form id="myform" method="post" action="" onsubmit="return Validate(this)">

回复收藏 0 原文

娇妻 2024-11-11 18:56:16

我来到这个问题，寻找 JavaScript 中的在线卡 PAN 验证器，可以安全地用于验证 PAN 校验位没有服务器恶意拦截的风险。

http://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers#JavaScript 中有大量 javascript Luhn 实现和 https://sites.google.com/site/abapexamples/javascript/luhn-validation。

这是典型的实现：

var LuhnCheck = (function()
{
    var luhnArr = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9];
    return function(str)
    {
        var counter = 0;
        var incNum;
        var odd = false;
        var temp = String(str).replace(/[^\d]/g, "");
        if ( temp.length == 0)
            return false;
        for (var i = temp.length-1; i >= 0; --i)
        {
            incNum = parseInt(temp.charAt(i), 10);
            counter += (odd = !odd)? incNum : luhnArr[incNum];
        }
        return (counter%10 == 0);
    }
})();

通过谷歌搜索“luhn jsfiddle”，我发现了另一个准备使用强大的在线验证器：

http://jsfiddle.net/silvinci/84bru/light/

I came to this question looking for online card PAN validator in javascript that can be safely used to verify PAN check digit without risk of malicious intercept on server.

There are plenty of javascript Luhn implementations at http://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers#JavaScript and https://sites.google.com/site/abapexamples/javascript/luhn-validation.

Here is typical implementation:

var LuhnCheck = (function()
{
    var luhnArr = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9];
    return function(str)
    {
        var counter = 0;
        var incNum;
        var odd = false;
        var temp = String(str).replace(/[^\d]/g, "");
        if ( temp.length == 0)
            return false;
        for (var i = temp.length-1; i >= 0; --i)
        {
            incNum = parseInt(temp.charAt(i), 10);
            counter += (odd = !odd)? incNum : luhnArr[incNum];
        }
        return (counter%10 == 0);
    }
})();

And by googling for "luhn jsfiddle" I've found another ready to use robust online validator:

http://jsfiddle.net/silvinci/84bru/light/

回复收藏 0 原文

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