// the used links
var links = [
'',
''];
openStuff = function () {
// get a random number between 0 and the number of links
var randIdx = Math.random() * links.length;
// round it, so it can be used as array index
randIdx = parseInt(randIdx, 10);
// construct the link to be opened
var link = links[randIdx];
// open it in a new window / tab (depends on browser setting)
// window.open(link, "_blank");
document.write(link);
};
openStuff();