Question

I have an asp text box for decimal numbers.
I have a jscript function to replace the num pad “.” character by the decimal separator used in the user culture(ex: en-US -> decimal separator: “.” pt-PT -> decimal separator: ‘,’)

here’s my function:

//method that substitutes num pad '.' with the current user culture decimal separator when num pad '.' key is hit

function onKeyDownPutDecimalSeparator(e, textBox) {

    var unicode = e.charCode ? e.charCode : e.keyCode;
    if (unicode == 110) {

        e.returnValue = false;
        e.cancel = true;

        textBox.value = textBox.value.concat(decimalSeparator);
    }

}

this is working fine on most browsers, including chrome and IE8, but in IE9 instead of
replacing, for ex. 1.2 -> 1,2,
is doing something like:

1.2 -> 1,.2 and when the text box looses focus, 1,2

the final value “1,2” is what i want, but that middle step when the user can actually see “1,.2” it’s just awfull

any tip on that?

Thanks

Answer 1

Instead of

textBox.value = textBox.value.concat(decimalSeparator);

Try

textBox.value = textBox.value.replace('.', decimalSeparator);