Funcion para validar el numero de CUIT obtenido de la pagina de la AFIP

gistfile1.js

function esCUITValida(inputValor) {
    inputString = inputValor.toString()
    if (inputString.length == 11) {
        var Caracters_1_2 = inputString.charAt(0) + inputString.charAt(1)
        if (Caracters_1_2 == "20" || Caracters_1_2 == "23" || Caracters_1_2 == "24" || Caracters_1_2 == "27" || Caracters_1_2 == "30" || Caracters_1_2 == "33" || Caracters_1_2 == "34") {
            var Count = inputString.charAt(0) * 5 + inputString.charAt(1) * 4 + inputString.charAt(2) * 3 + inputString.charAt(3) * 2 + inputString.charAt(4) * 7 + inputString.charAt(5) * 6 + inputString.charAt(6) * 5 + inputString.charAt(7) * 4 + inputString.charAt(8) * 3 + inputString.charAt(9) * 2 + inputString.charAt(10) * 1
            Division = Count / 11;
            if (Division == Math.floor(Division)) {
                return true
            }
        }
    }
    return false
}