Time -hour-minute-second showing javascript

js_clock.js

    function correct(income){
        income=income.toString();
        if(income.length<2){income = "0"+income}
        return income;
    }

    window.addEventListener('load',function(){
        var targetElementId='OclockDiv';
        var refreshFrequency=1000; //1 second =1000miliseconds
        window.setInterval(function(){
            var d = new Date();
            var dHour = correct(d.getHours());
            var dMinute = correct(d.getMinutes());
            var dSecond = correct(d.getSeconds());
        document.getElementById(targetElementId).innerText="Time is: "+ dHour +":"+dMinute+":"+dSecond;
    },refreshFrequency);

    });