// JavaScript Document

var banners = [ 'arenaDVD.gif',
			     'bestShop.gif',
				 'brastemp.gif',
				 'consul.gif',
				 'cvc.gif',
				 'havan.gif',
				 'joiascombr.gif',	
				 'linuxMall.gif',
				 'magazine25.gif',
				 'maniaVirtual.gif',
				 'musclePoint.gif',
				 'oceanAir.gif',
				 'omnilog.gif',
				 'passarela.gif',
				 'starPoint.gif',
				 'wolloko.gif'
			   ] 

function start() {
	for(var i in [1,2,3])
		document.write('<img style="margin-bottom:2px" src="img/clientes/casos/' + getImgRandom() + '"/>')
}

var a = [];
function getImgRandom() {
	var sorteio = Math.round(Math.random() * (banners.length - 1));
	if (contains(sorteio))
		return getImgRandom();
	a.push(sorteio);
	return banners[sorteio];
}

function contains(n){
	for(var i in a) if(a[i] == n) return true;
	return false;
}