var g_LoadCheckInterval;
var g_aImages = null;
var g_iImage = 0;
var g_LoadImage;
function $( elementId )
{
	return document.getElementById( elementId );
}
function checkLoadComplete()
{
	if( g_LoadImage.complete )
	{
		$('loaderAnim').style.display = "none";
		$('currentImg').src = g_LoadImage.src;
		clearInterval( g_LoadCheckInterval );		
	}
	else
	{
		$('loaderAnim').style.display = "block";
	}
}
function nextPicture()
{
	if( g_aImages == null )
	{	// initialize
		g_aImages = $('imagelist').value.split( ";" );
	}
	g_iImage++;
	$('prev').style.display = "inline";
	g_LoadImage = new Image();
	g_LoadImage.src = 'photos/' + g_aImages[g_iImage];
	if( g_iImage >= (g_aImages.length - 1) )
	{
		$('next').style.display = "none";
	}
	g_LoadCheckInterval = setInterval( "checkLoadComplete();", 100 );
}
function prevPicture()
{
	g_iImage--;
	$('next').style.display = "inline";
	g_LoadImage = new Image();
	g_LoadImage.src = 'photos/' + g_aImages[g_iImage];
	if( g_iImage == 0 )
	{
		$('prev').style.display = "none";
	}
	g_LoadCheckInterval = setInterval( "checkLoadComplete();", 100 );
}