document.write('<table><tr>');

var numArray = ["01","02","03","04","05","06","07","08","09","10","11","12"];

var num = Math.floor(Math.random() * 12);
document.write('<td><img class="thumb" src="common/thumbs/thumb' + numArray[num] + '.jpg" alt="Trondheim Photo" /></td>');

numArray.splice(num,1);
var num = Math.floor(Math.random() * 11);
document.write('<td><img class="thumb" src="common/thumbs/thumb' + numArray[num] + '.jpg" alt="Trondheim Photo" /></td>');

document.write('</tr><tr>');

numArray.splice(num,1);
var num = Math.floor(Math.random() * 10);
document.write('<td><img class="thumb" src="common/thumbs/thumb' + numArray[num] + '.jpg" alt="Trondheim Photo" /></td>');

numArray.splice(num,1);
var num = Math.floor(Math.random() * 9);
document.write('<td><img class="thumb" src="common/thumbs/thumb' + numArray[num] + '.jpg" alt="Trondheim Photo" /></td>');

document.write('</tr></table>');