// $Id: timer.js,v 1.6.2.3 2006/09/19 21:47:44 tjhunt Exp $
//
// QuizTimer
// Provides a counter that keeps track how much
// time user have left to check in started quiz.
//
function countdown_clock(theTimer) {
    var timeout_id = null;

	// @EC PF : current client time
	var ec_now_epoch = new Date().getTime();

	// @EC PF : time left according to client
	quizTimerValue = Math.floor( (ec_quiz_finish - ec_now_epoch) /1000 );

    if(quizTimerValue <= 0) {
        clearTimeout(timeout_id);
        var ourForm = document.forms['responseform'];
        ourForm.timeup.value = 1;
        if (ourForm.onsubmit) { 
	        ourForm.onsubmit();
	    }
        ourForm.submit();
        return;
    }

    now = quizTimerValue;
    var hours = Math.floor( now / 3600 );
    parseInt(hours);
    now = now - (hours * 3600);
    var minutes = Math.floor(now / 60);
    parseInt(minutes);
    now = now - (minutes * 60);
    var seconds = now;
    parseInt(seconds);

    var t = "" + hours;
    t += ((minutes < 10) ? ":0" : ":") + minutes;
    t += ((seconds < 10) ? ":0" : ":") + seconds;
    window.status = t.toString();

    if(hours == 0 && minutes == 0 && seconds <= 15) {
        //go from fff0f0 to ffe0e0 to ffd0d0...ff2020, ff1010, ff0000 in 15 steps
        var hexascii = "0123456789ABCDEF";
        var col = '#' + 'ff' + hexascii.charAt(seconds) + '0' + hexascii.charAt(seconds) + 0;
        theTimer.style.backgroundColor = col;
    }
    document.forms['clock'].time.value = t.toString();
    timeout_id = setTimeout("countdown_clock(theTimer)", 1000);
}

function movecounter(timerbox) {

    var pos;

    if (window.innerHeight) {
        pos = window.pageYOffset
    } else if (document.documentElement && document.documentElement.scrollTop) {
        pos = document.documentElement.scrollTop
    } else if (document.body) {
          pos = document.body.scrollTop
    }

    if (pos < theTop) {
        pos = theTop;
    } else {
        pos += 100;
    }
    if (pos == old) {
        timerbox.style.top = pos + 'px';
    }
    old = pos;
    temp = setTimeout('movecounter(timerbox)',100);
}

function xGetElementById(e)
{
  if(typeof(e)!='string') return e;
  if(document.getElementById) e=document.getElementById(e);
  else if(document.all) e=document.all[e];
  else e=null;
  return e;
}
