javascript验证，仅输入四个数字 [英] javascript validation for enter only four number

问题描述

hi

所有人，

我需要对我的文本框进行验证，该验证仅接受四个整数.如果用户仅输入两个或四个以上的数字，则会输入错误的数字.

因此，如果使用输入四个数字，则表示接受.

如果用户输入三个数字和一个空格，则还会输入错误的数字..

hi

to all,

i need a validation to my textbox, that accept only four integer. if user enter only two number or more than four it would say wrong number enter.

so if use enter four number it accept.

If user enter three number and one space than also it would raise message wrong number enter..

thanks!

推荐答案

通过正则表达式使用此验证.

[0-9] [0-9] [0-9] [0-9]

Use this validation using regex.

[0-9][0-9][0-9][0-9]

尝试此链接

http://bytes.com /topic/javascript/answers/90985-validate-form-4-digit-integer [

try this link

http://bytes.com/topic/javascript/answers/90985-validate-form-4-digit-integer[^]

you can also use this code and add only one or 2 line of code according to you requiremnest

<script type ="text/javascript">
    function MaskMoney(evt)
    {
    if (!(evt.keyCode == 46 || (evt.keyCode >= 48 && evt.keyCode <= 57))) return false;

    var parts = evt.srcElement.value.split('.');

    if (parts.length > 4) return false;
    if (evt.keyCode == 46) return (parts.length == 1);
    if (parts[0].length >= 14) return false;
    if (parts.length == 4 && parts[1].length >= 4) return false;
    }
    </script>


In aspx.cs page
-----------------

 protected void Page_Load(object sender, EventArgs e)
        {
            TextBox1.Attributes.Add("onKeydown", "return MaskMoney(event)");
        }

You can use \s*[0-9]\s*[0-9]\s*[0-9]\s*[0-9]\s* expression for allow spaces.

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