function random_img()
{
     var src = arguments[Math.floor(Math.random() * arguments.length)];
     document.write("<td width=\"300px\" style=\"background: url(" + src + ") no-repeat top left;\">");
}
function random_img2()
{
     var src = arguments[Math.floor(Math.random() * arguments.length)];
     document.write("<td width=\"360px\" style=\"background: url(" + src + ") no-repeat top left;\">");
}