var vertifChampNum = function(e)
{
    if (document.all) var e = event;
    if ((value = keypressIsNum(e)) !== false)
    {
        return true;
    }
    else if (keypressIsSpecialKey(e))
    {                         
        return true;
    }
    return keypressIsStop(e);
}

var vertifChampAlpha = function(e)
{
    if (document.all) var e = event;
    if ((value = keypressIsAlpha(e)) !== false)
    {
        return true;
    }
    else if (keypressIsSpecialKey(e))
    {                         
        return true;
    }
    return keypressIsStop(e);
}

function initAlphaField(idAlpha)
{
    var alpha = document.getElementById(idAlpha);

    alpha.vertifChampAlpha = vertifChampAlpha;
    alpha.onkeydown = alpha.vertifChampAlpha;
}

function initNumField(idNum)
{
    var num = document.getElementById(idNum);

    num.vertifChampNum = vertifChampNum;
    num.onkeydown = num.vertifChampNum;
}

function initAlphaField(idAlpha)
{
    var alpha = document.getElementById(idAlpha);

    alpha.vertifChampAlpha = vertifChampAlpha;
    alpha.onkeydown = alpha.vertifChampAlpha;
}