jQuery输入蒙版

嘿， 我是jQuery新手，我想在输入框上检查onblur这种格式的cda 123.表示前3个字符的空间和3个整数.通常，我看到代码是在Input id上编写的，但是如果我想在Class上写，那我该怎么做.例如，我有class ="InputMask-cccsnn" 我想在类上不在输入id上使用此格式CheckInputMask(this).如何更改我的以下代码.请回复

Hey, I am new to jQuery , I want to check onblur on input box this format cda 123 . mean first 3 characters space and 3 integers. Usually I see that code is written on Input id's but if I want on Class then how can I do this . For example I have class="InputMask-cccsnn" I want to have this on this format CheckInputMask(this) on class not on input id . How to change my following code . Please reply

以下是我在一个输入id上进行keyup的代码.

Following is my code on keyup on one input id.

$('input').keyup(function(e){
    var value = $(this).val();
    if(value.length <= 3) {
       char = value.substring(value.length - 1);
        if(!(isNaN(char))) {
            var newval = value.substring(0, value.length - 1);
            $(this).val(newval);
        }
    }
    if(value.length > 3) {
       char = value.substring(value.length - 1);
        if(isNaN(char)) {
            var newval = value.substring(0, value.length - 1);
            $(this).val(newval);
        }
    }
});