function checkKeyPressedInt(objEvent) {
    var reValidChars = /[\d\x0D\x08\x00]/;
    var iKeyCode, strKey;
    var strUserAgent = navigator.userAgent.toLowerCase();
    var isIE = strUserAgent.indexOf("msie") > -1;

    if (isIE) {
        iKeyCode = objEvent.keyCode;
    } else {
        iKeyCode = objEvent.which;
    }
    strKey = String.fromCharCode(iKeyCode);


    if (!reValidChars.test(strKey)) {
        alert("Dozwolone wartości to: \"1234567890\"");
        return false;
    }
    return true;
}
function zmienWydawn() {
    if (document.getElementById("wydaclear1").checked) {
        for (i = 1; i < 23; i++) {
            document.getElementById(i).checked = true;
        }
    }else{
         for (i = 1; i < 23; i++) {
            document.getElementById(i).checked = false;
        }
    }
}