var topBandOpacity=1 
var increaseFadeTopBand=false;
var fadeTopBandTimer=100;
var pauseFateTopBand=false;
var pauseFateTopTimer=1000;
var topBand=0;
var bottomBand=1;
var numberOfTopband=3;

function fadeTopBand(){
	if (increaseFadeTopBand){		
		if (topBandOpacity<1) topBandOpacity+=0.05;
		else {			
			increaseFadeTopBand=!increaseFadeTopBand;			
			bottomBand=topBand+1;
			if (bottomBand==numberOfTopband) bottomBand=0;
			document.getElementById("bottomBandId").src="pics/topBand" + (bottomBand+1) + ".jpg";	
			topBandOpacity=1;	
				
		}
	}else{
		if (topBandOpacity>0) topBandOpacity-=0.05;
		else {			
			increaseFadeTopBand=!increaseFadeTopBand;		
			topBand=bottomBand+1;
			if (topBand==numberOfTopband) topBand=0;
			document.getElementById("topBandId").src="pics/topBand" + (topBand+1) + ".jpg";		
			topBandOpacity=0;
			
		}
	}
	
	document.getElementById("topBandId").style.MozOpacity=topBandOpacity;
	document.getElementById("topBandId").style.filter="alpha(opacity="+topBandOpacity*100+")";	
	
	if (topBandOpacity==0 || topBandOpacity==1)
		timerFadeTopBand=setTimeout("fadeTopBand()", pauseFateTopTimer);
	else
		timerFadeTopBand=setTimeout("fadeTopBand()", fadeTopBandTimer);
}


function initFadeTopBand(){
	topBand=Math.floor(Math.random()*numberOfTopband);
	bottomBand=topBand+1;
	if (bottomBand==numberOfTopband) bottomBand=0;
	document.getElementById("bottomBandId").src="pics/topBand" + (bottomBand+1) + ".jpg";	
	document.getElementById("topBandId").src="pics/topBand" + (topBand+1) + ".jpg";	
	timerFadeTopBand=setTimeout("fadeTopBand()", pauseFateTopTimer);
}