images = new Array(4);
images[0] = "<img src='/charplate-mcginnus.gif' alt='Captain Catherine McGinnus' border=0>";
images[1] = "<img src='/charplate-relenko.gif' alt='Agent Boris Relenko' border=0>";
images[2] = "<img src='/charplate-shaker.gif' alt='Melissa Shaker' border=0>";
images[3] = "<img src='/charplate-mendolini.gif' alt='Tony Mendolini' border=0>";

index = Math.floor(Math.random() * images.length);
document.write("<td>"+images[index]+"</td>");