rnd.today=new Date();
rnd.seed=rnd.today.getTime();

function rnd() {
  rnd.seed = (rnd.seed*9301+49297) % 233280;
  return rnd.seed/(233280.0);
};

function rand(number) {
  return Math.ceil(rnd()*number);
};

var arrayOfBanners = new Array();
var arrayOfLinks = new Array();

arrayOfBanners[1] = 'consultoria.gif';
arrayOfLinks  [1] = '';
arrayOfBanners[2] = 'maranix.gif';
arrayOfLinks  [2] = 'www.maranix.com';
arrayOfBanners[3] = 'multicolor.gif';
arrayOfLinks  [3] = 'www.multicolorimprime.com';
arrayOfBanners[4] = 'vianney.gif';
arrayOfLinks  [4] = 'www.vianney.com.mx';
arrayOfBanners[5] = 'maranix2.gif';
arrayOfLinks  [5] = 'www.maranix.com';


function cambia_banner(nivel) {

  var banner = rand(arrayOfBanners.length-1);

  if (nivel == 0)
    document.images['banner'].src = 'banners/' + arrayOfBanners[banner];
  else
    document.images['banner'].src = '../banners/' + arrayOfBanners[banner];


  if (arrayOfLinks[banner] == '') {
    document.links[0].target = '';
    document.links[0].href = '#';
    document.images['banner'].alt = '';
  }
  else {
    document.links[0].target = '_blank';
    document.links[0].href = 'http://' + arrayOfLinks[banner];
    document.images['banner'].alt = 'Haz click aquí';
  }

  snivel = nivel;
  setTimeout('cambia_banner(snivel)',60000)
}

function ver_banners() {
  for (a=1;a<arrayOfBanners.length;a++) {
    if (arrayOfLinks[a]!='')
      document.write('<a href="http://' + arrayOfLinks[a] +'" target="_blank">');
    document.write('<img src="banners/' + arrayOfBanners[a] + '" width="468" height="60" border="0">');
    if (arrayOfLinks[a]!='')
      document.write('</a>');
    document.write('<br><br>');
  }
}