使用JavaScript在文本框中允许Ctrl + C，Ctrl + X和Ctrl + V组合

Question

I have created a webform where I want to validate the input. User can only input numbers (including Ctrl + C , Ctrl + X and Ctrl + V combinations).

Below is my javascript code.

 var unicode = e.charCode ? e.charCode : e.keyCode
    if (unicode != 8 && unicode != 9 && unicode != 46 && unicode != 37 && unicode != 39) { //if the key isn't the backspace key (which we should allow)
        if (unicode < 48 || unicode > 57) //if not a number
            return false //disable key press
    }

But it is not validating (".") period as the key code for delete and the combinations of the Ctrl + C , Ctrl + X and Ctrl V are not working.

Can anyone help?

Answer 1

I found the solution below:

function numbersonly(evt) {
        evt = (evt) ? evt : window.event;
        var charCode = (evt.which) ? evt.which : evt.keyCode;
        if (charCode > 31 && (charCode < 48 || charCode > 57)) {
            return false;
        }
        return true;
    }

Thank you all for time and help.