相关疑难解决方法(0)

在JavaScript中验证十进制数的最干净,最有效的方法是什么？

奖励积分:

1. 明晰.解决方案应该干净简单.
2. 跨平台.

测试用例:

01. IsNumeric('-1')      => true
02. IsNumeric('-1.5')    => true
03. IsNumeric('0')       => true
04. IsNumeric('0.42')    => true
05. IsNumeric('.42')     => true
06. IsNumeric('99,999')  => false
07. IsNumeric('0x89f')   => false
08. IsNumeric('#abcdef') => false
09. IsNumeric('1.2.3')   => false
10. IsNumeric('')        => false
11. IsNumeric('blah')    => false

我正在构建一个付款表单并使用jQuery验证来执行我的验证.如果它有2位小数,我怎么才能验证"付款金额"字段？如果用户在金额上取消.00,我希望它失败.

这是我的Javascript:

$(document).ready(function () {

    $('#payment-form').validate({ // initialize the plugin
        rules: {
            order_id: {
                required: true
            },
            price: {
                required: true,
                number: true
            }
        },
        messages: {
            order_id: "Please enter your Invoice Number",
            price: "Please enter Payment Amount"
        },
        submitHandler: function (form) { // for demo
            alert('valid form submitted'); // for demo
            return false; // for demo
            //form.submit();
        }
    });

    $('#price').keypress(function(event) {
        if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57)) {
            event.preventDefault(); …