imagescontent = new Array(5);
imagescontent[0] = "<tr><td class='subbanner1'></td></tr>";
imagescontent[1] = "<tr><td class='subbanner2'></td></tr>";
imagescontent[2] = "<tr><td class='subbanner3'></td></tr>";
imagescontent[3] = "<tr><td class='subbanner4'></td></tr>";
imagescontent[4] = "<tr><td class='subbanner5'></td></tr>";
index = Math.floor(Math.random() * imagescontent.length);