Input에 숫자만 입력할 수 있도록

<input type="text" style="ime-mode:disabled;" onKeyPress="return numbersonly(event, false)">


function numbersonly(e, decimal) {
    var key;
    var keychar;

    if (window.event) {
        key = window.event.keyCode;
    } else if (e) {
        key = e.which;
    } else {
        return true;
    }
    keychar = String.fromCharCode(key);

    if ((key == null) || (key == 0) || (key == 8) || (key == 9) || (key == 13)
            || (key == 27)) {
        return true;
    } else if ((("0123456789").indexOf(keychar) > -1)) {
        return true;
    } else if (decimal && (keychar == ".")) {
        return true;
    } else
        return false;
}

 

출처 : http://forums.mozilla.or.kr/viewtopic.php?p=27386&sid=2bdee50d9b27286f7f0f133304dcfeeb