YLShipBuildLandMap/YLShipBuildLandMap.Web/wwwroot/app/main/js/vroom.js

// Calculator for converting Miles to Kilometers


$(document).ready(function () {
    TweenLite.to(needle, 2, {rotation: -31, transformOrigin: "bottom right"});

    // select current content in input boxes on click
    $("input[type='text']").on("click", function () {
        $(this).select();
    });

    //clear kilometers value when miles is selected
    $("#miles").focus(function () {
        $("#kilometers").val('');
    });

    //clear miles value when kilometers is selected
    $("#kilometers").focus(function () {
        $("#miles").val('');
    });

    // convert miles to kilometers
    $('#miles').keyup(function () {
        var mi = $(this).val();
        var miNum = parseInt(mi) * 1.6093;
        //make sure kmNum is a number then output
        if ((mi <= 75) && !isNaN(miNum)) {
            var speedMi = miNum * 2 - 31;
            $('#numbers').css('text-align', 'center');
            $('#kilometers').val(miNum.toFixed(2));
            $('#numbers').html(miNum.toFixed(0));
            $('#mi-km').html('Kilometers');
        } else if (!isNaN(miNum)) {
            var speedMi = 215;
            $('#numbers').css('text-align', 'right');
            $('#kilometers').val(miNum.toFixed(2));
            $('#numbers').html(miNum.toFixed(0));
            $('#mi-km').html('Kilometers');
        } else {
            $('#miles').val('');
            $('#kilometers').val('');
            $('#numbers').html('');
            $("#errmsg").html("Numbers Only").show().fadeOut(1600);
        }

        var needle = $("#needle");
        TweenLite.to(needle, 2, {rotation: speedMi, transformOrigin: "bottom right"});
    });

    // convert kilometers to miles
    $('#kilometers').keyup(function () {
        var km = $(this).val();
        var kmNum = parseInt(km) * 0.62137;
        //make sure kmNum is a number then output
        if ((km <= 195) && !isNaN(kmNum)) {
            var speedKm = kmNum * 2 - 31;
            $('#numbers').css('text-align', 'center');
            $('#miles').val(kmNum.toFixed(2));
            $('#numbers').html(kmNum.toFixed(0));
            $('#mi-km').html('Miles');
        } else if (!isNaN(kmNum)) {
            var speedKm = 215;
            $('#numbers').css('text-align', 'right');
            $('#miles').val(kmNum.toFixed(2));
            $('#numbers').html(kmNum.toFixed(0));
            $('#mi-km').html('Miles');
        } else {
            $('#miles').val('');
            $('#kilometers').val('');
            $('#numbers').html('');
            $("#errmsg").html("Numbers Only").show().fadeOut(1600);
        }

        var needle = $("#needle");
        TweenLite.to(needle, 2, {rotation: speedKm, transformOrigin: "bottom right"});
    });

});