text = new Array(1);

text[0] = "<a target='_blank' rel='nofollow' class='mainlevel-nav' href = 'http://www.shareasale.com/r.cfm?B=211963&U=96183&M=25550'>Free Wedding Site</a>";

index = Math.floor(Math.random() * text.length);
document.write(text[index]);