var Banner 	= new Array;
var Link 		= new Array;
var ID_link 	= new Array;
Owner		 	= new Array;
var howManyBanners = Banner.length;
var BannerCurrentNum = 0;
var ID; 
 function doRandom(){ 
 if (BannerCurrentNum == howManyBanners) {
	BannerCurrentNum = 0;
}
var randomnumber=Math.floor(Math.random()*-1) 
 document.getElementById('link').href	= Link[randomnumber]; 
 document.getElementById('image').src	= Banner[randomnumber];
document.getElementById('image').title= Owner[randomnumber];
document.getElementById('image').alt	= Owner[randomnumber];
document.getElementById('image').onMouseOver	= window.status='Veja mais na secção Eventos ou clique no link para ver a página do anunciante'; return true;document.getElementById('image').onMouseOut	= window.status=''; return true;BannerCurrentNum++;
return true; 
 }