文本框仅接受一个点(.)，数字，bacspace和删除按钮 [英] textbox accepts only one dot(.), digit, bacspace and delete button working

问题描述

我正在开发一个应用程序，我要在其中验证仅接受单个点(.)，数字和退格键以及删除按钮的文本框.请帮助我做到这一点.我急着用.

I am developing an application where i want to validate the textbox which can accept only single dot(.), digits, and backspace and delete button. please help me to do this. i need this in hurry.

推荐答案

朋友，

Friend,

function onlyNumbers(evt)
{
    var e = event || evt; // for trans-browser compatibility
    var charCode = e.which || e.keyCode;
    if (charCode ==8 || charCode ==46 || charCode < 48 || charCode > 57 || charCode ==190)
    {
        return true;
    }
    else
    {
       return false;
    }
}

参考
http://www.aspdotnetfaq.com/Faq/What-is-the-the-list-of-KeyCodes-for-JavaScript-KeyDown-KeyPress-and-KeyUp-events.aspx [

Reference
http://www.aspdotnetfaq.com/Faq/What-is-the-list-of-KeyCodes-for-JavaScript-KeyDown-KeyPress-and-KeyUp-events.aspx[^]

If useful accept and vote!!

Regards,
Karthik.J

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