Display Live Date And Time Using JavaScript and JQuery

<html xmlns="http://www.w3.org/1999/xhtml">

    <head runat="server">
        <title>jQuery display current time on webpage</title>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
        </script>
        <script type="text/javascript">
        // datetime make using jquery
        $(document)
            .ready(function ()
            {
                ShowTime();
            });

        function ShowTime()
        {
            var dt = new Date();
            document.getElementById("lblTime")
                .innerHTML = dt.toLocaleTimeString();
            window.setTimeout("ShowTime()", 1000); // Here 1000(milliseconds) means one 1 Sec
        }
        </script>
        <script>
        // date time make only javascript
        function startTime()
        {
            var today = new Date();
            var h = today.getHours();
            var m = today.getMinutes();
            var s = today.getSeconds();
            var d = new Date();
            var n = d.getDate();
            var month = new Array();
            month[0] = "January";
            month[1] = "February";
            month[2] = "March";
            month[3] = "April";
            month[4] = "May";
            month[5] = "June";
            month[6] = "July";
            month[7] = "August";
            month[8] = "September";
            month[9] = "October";
            month[10] = "November";
            month[11] = "December";
            var t = month[d.getMonth()];
            var y = d.getFullYear();
            m = checkTime(m);
            s = checkTime(s);
            document.getElementById('txt')
                .innerHTML = n + "-" + t + "-" + y + " " + h + ":" + m + ":" + s;
            var t = setTimeout(function ()
            {
                startTime()
            }, 500);
        }

        function checkTime(i)
        {
            if(i < 10)
            {
                i = "0" + i
            }; // add zero in front of numbers < 10
            return i;
        }
        </script>
    </head>

    <body onload="startTime()">
        <form id="form1">
            <div> jQuery Display time second by second.
                <label id="lblTime" style=" font-weight:bold"></label>
                <br>
                <br> Javascript Display time second by second. </div>
            <div>
                <div id="txt" style="color:#51545C; float:left; font-size:16px; font-weight:bold; margin-right: 12px;"></div>
            </div>
        </form>
    </body>

</html>