var siteno=Math.round(1 + 18*Math.random());
var url="site"+siteno+".htm";
var image="http://www.morpethweb.com/banners/banner"+siteno+".gif";
document.write("<p align='center'><a href='http://www.morpethweb.com/banners/"+url+"' target='_blank'><img border='0'src='"+image+"'></a></p>")