images = new Array(3);

images[0] = "<a target='_blank' href = 'http://film.tech21th.com/2010/07/charice-pyramid-featuring-iyaz-studio.html' alt='Charice - Pyramid featuring Iyaz - Studio Version - Tech21th.com' title='Charice - Pyramid featuring Iyaz - Studio Version'><img src='http://i2.ytimg.com/vi/BhT2HhEllpw/default.jpg' alt='Charice - Pyramid featuring Iyaz - Studio Version - Tech21th.com' title='Charice - Pyramid featuring Iyaz - Studio Version' height='120px' width='192px' ></a>";
images[1] = "<a target='_blank' href = 'http://film.tech21th.com/2010/07/tell-me-goodbye-big-bang.html' alt='Tell me good bye - Big Bang - Tech21th.com' title='Tell me good bye - Big Bang'><img src='http://i2.ytimg.com/vi/GE_4RtpVVaw/default.jpg' alt='Tell me good bye - Big Bang - Tech21th.com' title='Tell me good bye - Big Bang' height='120px' width='192px'></a>";
images[2] = "<a target='_blank' href = 'http://film.tech21th.com/search/label/Ch%C3%ADt%20v%C3%A0%20Pi' alt='Chít và Pi - Tech21th.com' title='Chít và Pi'><img src='http://axemphim.com/images/film/Chit-Va-Bi.jpg' alt='Chít và Pi - Tech21th.com' title='Chít và Pi' height='120px' width='192px'></a>";
images[3] = "<a target='_blank' href = 'http://film.tech21th.com/search/label/Camera%20C%C3%B4ng%20s%E1%BB%9F' alt='Camera công sở - Tech21th.com' title='Camera công sở'><img src='http://vnexpress.net/Files/Subject/3B/A1/9C/6C/2.jpg' alt='Camera công sở - Tech21th.com' title='Camera công sở' height='120px' width='192px'></a>";

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

document.write(images[index]);