var max      = 10;
  var nrImages = 04;
  function makeImages() {    
    this[0]     = "http://www.portalbizarro.com/wp-content/uplouds/2010/08/forever.gif"; 
	this[1]     = "http://www.portalbizarro.com/wp-content/uplouds/2010/07/MIX.jpg";     
	this[2]     = "http://www.portalbizarro.com/wp-content/uplouds/2010/08/forever.gif"; 
	this[3]     = "http://www.portalbizarro.com/wp-content/uplouds/2010/07/MIX.jpg";      
    this.length = nrImages;
}
  function makeLinks() {       
    this[0]     = "http://www.foreverliving.com.br/distribuidor/176/giovanicosta/";
	this[1]     = "http://www.mixmaster.com.br/";    
	this[2]     = "http://www.foreverliving.com.br/distribuidor/176/giovanicosta/";  
	this[3]     = "http://www.mixmaster.com.br/";      
    this.length = nrImages;

  }
  var vetImages = new makeImages();
  var vetLinks  = new makeLinks();
  var x = Math.round(Math.random()*max);
  var y    = max / nrImages;
  for(var cont = 1;cont*y <= max;cont++) {
    if (x <= (cont*y)) {
      document.write("<a href="+vetLinks[cont-1]+" target=_blank><img  src="+vetImages[cont-1]+" border=0></a>");
      break;
    }
  }