function toggle(idType, idNumber, idCount) {
	document.getElementById(idType + idNumber).style.display = "block";
	for (var i=0; i<idCount; i++) 
		if (i != idNumber)
			document.getElementById(idType + i).style.display = "none";
}

function swapImage (idType, idNumber, idCount) {
	document.getElementById(idType + idNumber).src = "images/" + idType + idNumber + ".png";
	for (var i=0; i<idCount; i++) 
		if (i != idNumber)
			document.getElementById(idType + i).src = "images/" + idType + i + "_off.png";
}

 function atlasTracking(source) {
	var image = new Image();
	image.src = "http://switch.atdmt.com/action/" + source;
}

var c = 0;
var t;

function rotateText()
{
	toggle("homePC", c, 3);
	
	if (c == 0)
		c = 1;
	else if (c == 1)
		c = 2;
	else
		c = 0;
		
	t = setTimeout("rotateText()",4000);
}


function openModal(modalId)
{
	modalContainer = document.getElementById(modalId);
	modal = getElementsByClassName('modalPopup', modalContainer)[0];
	modalbg = document.getElementById('modal_overlay');
	modalbg.style.display = 'block';	
	modalContainer.style.display = 'block';			
	modal.style.marginTop = '-' + (modal.offsetHeight/2) + 'px';
	modal.style.marginLeft = '-' + (modal.offsetWidth/2) + 'px';		
	modal.style.top = document.body.scrollTop; 
	window.onscroll = function () { 
			modalbg.style.top = document.body.scrollTop;
			modal.style.top = document.body.scrollTop; 
	};
}
function closeModal(modalId)
{
	modalContainer = document.getElementById(modalId);	
	modalbg = document.getElementById('modal_overlay');	
	modalContainer.style.display = 'none';	;
	modalbg.style.display = 'none';	 
} 
 
function getElementsByClassName(classname, node)  {
	if(!node) node = document.getElementsByTagName("body")[0];
	var a = [];
	var re = new RegExp('\\b' + classname + '\\b');
	var els = node.getElementsByTagName("*");
	for(var i=0,j=els.length; i<j; i++)
			if(re.test(els[i].className))a.push(els[i]);
	return a;
}