function selectImage( index )
{
	if( index > images.length-1 || index < 0 )
	{
		return;
	}
	currentIndex = index;
	
	if( index == images.length-1 )
	{
		document.getElementById( "nextArrow" ).style.visibility = "hidden";
	}
	else
	{
		document.getElementById( "nextArrow" ).style.visibility = "visible";
	}
	if( index == 0 )
	{
		document.getElementById( "previousArrow" ).style.visibility = "hidden";
	}
	else
	{
		document.getElementById( "previousArrow" ).style.visibility = "visible";
	}
	
	var powerPointDiv = document.getElementById( "powerPointDiv" );
	powerPointDiv.innerHTML = '<img src="'+images[index]+'" alt="powerpoint bild" />';
}

function nextImage()
{
	selectImage( currentIndex + 1 );
}

function previousImage()
{
	selectImage( currentIndex - 1 );
}
	
function playMovie ()
{
	var player = document.getElementById("player");
	player.play();
}
function stopMovie ()
{
	var player = document.getElementById("player");
	player.stop();
}
function pauseMovie ()
{
	var player = document.getElementById("player");
	player.pause();
}

function changePosition( position )
{
	var player = document.getElementById( "player" );
	player.currentPosition = position;
	player.play();
	//wmp.changePosition( position );
}

function checkBrowser()
{
	if (navigator.appVersion.indexOf("MSIE") < 0)
	{
		document.getElementById("dropDownDiv").innerHTML = 'Din webbläsare stödjer inte kapitelval';
	}
}