images = new Array(2);

images[0] = "<a href ='http://nationalepicknickdag.nl/'><img src='http://www.nieuwemensenlerenkennen.nl/images/banner/banner_agenda135.jpg' alt=' NMLK Nachtkanoen!' id=' NMLK Nachtkanoen!' border=0></a>";


index = Math.floor(Math.random() * images.length);

document.write(images[index]);
//done