loan calculator js functions

loan-calculator.js

function cal_eligibility() {
    var e = 1e5,
        r = document.getElementById("months_display").value / 12,
        a = document.getElementById("interest_display").value / 100,
        t = document.getElementById("income_display").value;
    repay_max = 50, repay_min = 35;
    var s = t * repay_max / 100,
        n = t * repay_min / 100,
        i = Math.pow(1 + a / 12, 12 * r),
        o = parseFloat(e) / ((1 - 1 / i) / (a / 12)),
        l = Math.round(s / o),
        u = Math.round(n / o),
        d = " Lacs",
        c = " Lacs";
    l >= 100 && (d = " Cr", l /= 100, l = Math.round(100 * l) / 100), u >= 100 && (c = " Cr", u /= 100, u = Math.round(100 * u) / 100), document.getElementById("result_eligible").innerHTML = " " + u + c + " - " + l + d
}