var isBackend = false;
function videoItemSelected(number)
{
	currentVideo = number;
	peVideo.stop();
	peVideo = new PeriodicalExecuter(rotateVideos, rotatingInterval);
	changeVideoItem(number);
}

function changeVideoItem(number){
	var object = document.getElementById("video-list");	
	var arr = object.getElementsByTagName('a');	
	for(i=0;i<arr.length;i++) arr[i].className = "right-panel-row-2";	
	
	var object = document.getElementById("video-images");	
	var arr = object.getElementsByTagName('a');	
	for(i=0;i<arr.length;i++) arr[i].style.display = "none";	
	
	$('video-link-'+number).className = 'right-panel-row-1';
	$('video-image-'+number).show(); 
}

function pollItemClicked(item, hiddenField, value)
{
	var object = document.getElementById("poll");	
	var arr = object.getElementsByTagName('span');	
	for(i=0;i<arr.length;i++) arr[i].className = "bullet bullet-normal";	
	var obj = document.getElementById(item);
	obj.className = 'bullet bullet-selected';
	document.getElementById(hiddenField).value = value
}

function changeCollapsedExpanded(item)
{
	if(item.className == "poll-panel-extended") item.className = "poll-panel-collapsed";
	else item.className = "poll-panel-extended";
}

var currentFontSize = 11;
function incrementDecrementFont(step, object1, object2)
{		
	if ((currentFontSize+step) <= 8 || (currentFontSize+step) >= 20) 
	{	
		return false;
	}
	else
	{	
		$('decrText').className = 'txt-decr-enabled';
		$('incrText').className = 'txt-incr-enabled';
		currentFontSize += step;
		document.getElementById(object1).style.fontSize = currentFontSize + 'px';
		document.getElementById(object2).style.fontSize = currentFontSize + 'px';
	}
	
	if ((currentFontSize+step) <= 8)
	{			
		$('decrText').className = 'txt-decr-disabled';
	}
	
	if ((currentFontSize+step) >= 20)
	{
		$('incrText').className = 'txt-incr-disabled';
	}
}

var currentVideo = 1;
var peVideo;
var rotatingInterval;
function rotateVideos()
{
	var object = document.getElementById("video-list");	
	var array = object.getElementsByTagName('a');
 
	if (currentVideo>=array.length) 
		currentVideo=1
	else 
	
	currentVideo++
	videoItemSelected(currentVideo);
}

function startRotateVideos(interval)
{	
	rotatingInterval = interval;
	peVideo = new PeriodicalExecuter(rotateVideos, interval);
}

function popup(url,winWidth,winHeight,sb) 
{
	winTop = (screen.height - winHeight) / 2;
	winLeft = (screen.width - winWidth) / 2;
	window.open(url,"","width=" + winWidth + ",height=" + winHeight + ",top=" + winTop  + ",left=" + winLeft  + ",resizable=no,scrollbars=" + sb + ",toolbar=no");
}