function updateVoltage(voltage)
{

    var voltage_min = 9.5;
    var voltage_max = 12.5;
    var voltage_range = voltage_max - voltage_min;

    var voltage_percentage = (voltage - voltage_min) / voltage_range * 100;

    var voltage_string = "";
    voltage_string = voltage_string.concat(voltage_percentage);
    voltage_string = voltage_string.substring(0,4);
    voltage_string = voltage_string.concat('%');

    document.getElementById("VoltageDisplay").style.width = voltage_string;
    document.getElementById("VoltageDisplay").innerHTML = voltage_string;

    if (voltage_percentage < 50 && voltage_percentage > 25 ) {
        document.getElementById("VoltageDisplay").className = "progress-bar progress-bar-warning"
    }
    else if ( voltage_percentage <= 25)
    {
        document.getElementById("VoltageDisplay").className = "progress-bar progress-bar-danger"
        var sound = document.getElementById("audio");
        sound.play()
        console.log("Pay Sound")
    }
    else
    {
        document.getElementById("VoltageDisplay").className = "progress-bar progress-bar-success"
    }
};

function updateUpTime(time)
{
    document.getElementById("UpTime").innerHTML = time
};


function validateForm()
{
    ros.attemptConnection();
    return false;
};