var which = Math.round((photos.length-1) * Math.random()) 

var preloadedimages=new Array()
for (i=0;i<photos.length;i++){
	preloadedimages[i]=new Image()
	preloadedimages[i].src=photos[i]
}

function backward(){
	if(which == 0){
		which = photos.length;
	}
	if (which>0){
		which--
		document.images.photoslider.src=photos[which]
		document.getElementById('photosliderlink1').href =links[which]
		document.getElementById('photosliderlink2').href =links[which]
		document.getElementById('photosliderlink2').innerHTML =captions[which]
	}
}

function forward(){
	if(which == photos.length-1){
		which = -1;
	
	}
	if (which<photos.length-1){
		which++
		document.images.photoslider.src=photos[which]
		document.getElementById('photosliderlink1').href =links[which]
		document.getElementById('photosliderlink2').href =links[which]
		document.getElementById('photosliderlink2').innerHTML =captions[which]
	}
}



//----- Rotativo + velocidade ----------------
	
SlideShowSpeed = 5000;
function vai(){
	forward();
	setTimeout('vai()', SlideShowSpeed);
}
setTimeout('vai()', SlideShowSpeed);