function resizeBacground(sourceDiv, incrementHeight)
{
	if( document.getElementById(sourceDiv) != null )
	{
		var targetDiv = sourceDiv + "Back";
		newHeight = document.getElementById(sourceDiv).offsetHeight;
		newHeight += incrementHeight;
		document.getElementById(targetDiv).style.height = newHeight + "px";
	}
}
function bildeserieBla(nr,target)
{
	newXpos = (nr-1) * -550;
	new Effect.Move (target,{ x:newXpos, y:0, duration: 0.4, mode: 'absolute'});
}
function letogfinnSlide(dir,target)
{
	if (dir =='next')
		var step = -120;
	else
		var step = 120;
	new Effect.Move(target, { x: step, y: 0, mode: 'relative' });
}

function byttBanner( nr, bilde, link, clear )
{
	if( clear == 1 )
	{
		window.clearInterval(intval);
		intval="";
	}
	
	var vent = function() {fadeInBanner(bilde,link)};
	
	window.setTimeout(vent, 400 );
	new Effect.Fade('mainBannerImg', {duration:0.4, from:1.0, to:0.0});
	
	//document.getElementById('mainBannerImg').style.display = 'none';

}

function fadeInBanner(bilde,link)
{
	document.getElementById('mainBannerImg').src = bilde;


	new Effect.Appear('mainBannerImg', {duration:0.4, from:0.0, to:1.0});
}

function rotBanner()
{
	intval = window.setInterval("xrotBanner()",10000);
}

function xrotBanner()
{
	var nr 		= document.getElementById('b_nr').innerHTML;
	var totAnt	= document.getElementById('b_tot').innerHTML;
	
	if( totAnt >= nr )
	{
		bilde 	= eval('banner_bilde'+nr);
		byttBanner( nr, bilde.src, bilde.alt, 0 );
		if( nr < totAnt )
			nr++;
		else
			nr = 1;
		document.getElementById('b_nr').innerHTML = nr;
	}
	
	
	//var bilde 	= document.getElementById('b_bilde').innerHTML;
	
}