var currentElement=1;

function moveTab(orientation)
{
	
	document.getElementById('page_' + currentElement).style.display = "none";
	
	if(orientation == "left") {
		if(currentElement==1)
		{
			currentElement=3;
			document.getElementById('page_' + 3).style.display = "block";
		}
		else if(currentElement!=1)
		{
			currentElement = currentElement-1;
			document.getElementById('page_' + currentElement).style.display = "block";
		}
	}
	
	else if(orientation == "right"){
		if(currentElement==3)
		{
			currentElement=1;
			document.getElementById('page_' + 1).style.display = "block";
		}
		else  if(currentElement!=3)
		{
			currentElement++;
			document.getElementById('page_' + currentElement).style.display = "block";
		}
	}
	
	
	moveCircle(currentElement);
	
}


function moveCircle(circleNum){

	for (i=1;i<=3;i++)
	{
		if(i==circleNum){document.getElementById('circle_' + i).className ='empty_circle';}
		else{document.getElementById('circle_' + i).className ='full_circle';}
	}
}



startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("media_box");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace(" over", "");
   }
   }
  }
 }
}
window.onload=startList;