//******************************************************************************
// Module           :   DigitalClock.js
// Author           :   Alexander Bell
// Copyright        :   2007-2009 Alexander Bell
// Date Created     :   02/15/2007
// Last Modified    :   06/25/2009
// Version          :   1.06
// Description      :   High-Resolution Digital Clock (ASP.NET/Javascript)

//******************************************************************************
// DISCLAIMER: This Application is provide on AS IS basis without any warranty
//******************************************************************************

// div element ID to display Date/Time
var _tClock = "Clk";

// var to start/stop clock updates
var _pID="";

// start clock onload
StartTopClockOnLoad(StartTopClock);

// loader
function StartTopClockOnLoad(tFunc) 
{
    if (window.addEventListener) 
    { window.addEventListener('load', tFunc, false);}
    else if (window.attachEvent) {window.attachEvent('onload', tFunc); }
}

// start digital clock
function StartTopClock() 
{ _pID = window.setInterval('UpdateTopClock()', 100);}

// update date/time reading
function UpdateTopClock() 
{
    try 
    {
        (document.getElementById(_tClock)).innerHTML =
	     DateAndTime('d', 't', '', '', '', '');
    }
    catch (e) { }
}

// function to return date/time string
//****************************************************************
// ShowDate :   Flag to include DATE
// ShowTime :   Flag to include TIME
// md       :   Day/Month format: MM/DD (default) or DD/MM
// Clock24  :   Use 12 or 24 hr. Clock
// ShowMS   :   Flag to include milliseconds (1 digit)
// LocUTC   :   Select between Local (default) or UTC time
function DateAndTime(ShowDate, 
                     ShowTime, 
                     md,
                     Clock24, 
                     ShowMS,
                     LocUTC)
{
    // private vars
    var yyyy;       // Year
    var mm;         // Month
    var dd;         // Day
    var h;          // Hours
    var m;          // Minutes
    var s;          // Seconds
    var ms;         // Milliseconds
    var ampm;       // AM or PM
    var strD;       // temp string for Date
    var strT;       // temp string for Time
    var ret="";     // return string

    // new DATE and TIME object
    dtNow = new Date();
    
    // if parameter not empty, format and add date
    if (ShowDate!=""){
        // UTC DATE
        if (LocUTC=="UTC") {
	        yyyy =dtNow.getUTCFullYear();
	        mm =dtNow.getUTCMonth()+1;
	        dd =dtNow.getUTCDate();
	    }
	    // local DATE(Default)
	    else {
	    	yyyy =dtNow.getFullYear();
	    	//yyyy =dtNow.getYear();
	        mm =dtNow.getMonth()+1;
	        dd =dtNow.getDate();
	    }
    
        // use 2 digits MM/DD format
        if (mm<10) mm="0"+mm;
        if (dd<10) dd="0"+dd;
        
        // use MMDD or DDMM (Default: MMDD)
        if (md=="ddmm") {strD= dd + '/' + mm + '/' + yyyy;}
        else {strD= mm + '/'+ dd +'/' + yyyy;}
        
        //DATE STRING
        ret=strD + " ";
    }

    // if parameter not empty, format and add time
    if (ShowTime != "")
    {
        // UTC time
        if (LocUTC=="UTC") {
	        h =dtNow.getUTCHours();
	        m =dtNow.getUTCMinutes();
	        s =dtNow.getUTCSeconds();
	        ms=dtNow.getUTCMilliseconds();
	    }
	    // local time(Default)
	    else {
	        h =dtNow.getHours();
	        m =dtNow.getMinutes();
	        s =dtNow.getSeconds();
	        ms=dtNow.getMilliseconds();
	    }
        // use 2 digits for H, M and S
        if (h<10) h="0"+h;
        if (m<10) m="0"+m;
        if (s<10) s="0"+s;

        // add milliseconds
        if (ShowMS != "") { ms = "." + Math.round(ms / 100 - 0.5); } else {ms = ""; }

        // use 12/24 Clock (default 12 hr clock)
        if (Clock24=="24") {strT =h+':'+m+':'+s + ms;}
        else {
	        ampm= (h>=12) ? "PM":"AM";
	        if (h>12) 	h-=12;
	        if (h==0) 	h=12;
	        strT= h + ':' + m + ':' + s + ms + ' ' + ampm;
	     }
	    // time string
        ret += strT;
    }
    
    // optional UTC prefix
    ret=((LocUTC=="UTC")? "UTC " : "" ) + ret;

    // return string
    return(ret);
}