textbox accepts only one dot(.), digit, bacspace and delete button working

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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.

Posted 7-Sep-12 0:35am

Imteyaz Ahmed

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Karthik J, Coimbatore · Answer 1 · 2012-09-07T00:47:00

Friend,

JavaScript

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;
    }
}

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