var currentStart = 1;

function setupHeadlineImages(count)
{
	var i;
	for(i = 8; i <= count; i++)
	{
		document.getElementById("p"+i).style.display = "none";
	}
}

function changeHeadlineForward(count)
{
	lastImage = currentStart + count - 1;
	
	if(count < lastImage)
		return;
		
	/* hide first element */
	document.getElementById("p"+currentStart).style.display = "none";
	
	/* display last element */
	document.getElementById("p"+lastImage).style.display = "inline";
	
	currentStart++;
	
	if(lastImage == count)
	{
		document.images["forward"].src = "../../img/nav/forward_inactive.png";
	}
	else
		document.images["forward"].src = "../../img/nav/forward.png";
	
	if(currentStart == 1)
	{
		document.images["backward"].src = "../../img/nav/backward_inactive.png";
	}
	else
		document.images["backward"].src = "../../img/nav/backward.png";
		
}

function changeHeadlineBackward(count)
{
	if(currentStart == 1)
		return;
		
	lastImage = currentStart + count - 2;
	
	/* hide last element */
	document.getElementById("p"+lastImage).style.display = "none";
	
	currentStart--;
	/* display first image */
	document.getElementById("p"+currentStart).style.display = "inline";
	
	if(lastImage + 1 == count)
	{
		document.images["forward"].src = "../../img/nav/forward_inactive.png";
	}
	else
		document.images["forward"].src = "../../img/nav/forward.png";
		
	if(currentStart == 1)
	{
		document.images["backward"].src = "../../img/nav/backward_inactive.png";
	}
	else
		document.images["backward"].src = "../../img/nav/backward.png";
}