Display Current Time on the web page

Below example helps you to display current time on the web page. Textbox value will be updated with the current time every second.

Add following code to the page,
<script type="text/javascript">
    function DisplayTime() 
    {
        var currentDate = new Date();
        document.getElementById("<%= TextTime.ClientID %>").value = currentDate.toLocaleTimeString();
        window.setTimeout("DisplayTime()", 1000);
    }   
</script>

<script type="text/javascript">
    window.setTimeout("DisplayTime()", 1000);
</script>

<asp:TextBox ID="TextTime" runat="server"></asp:TextBox>