var randomnumber;
		var x;
		var books;
		
		books = 20;
		
		randomnumber = Math.floor(Math.random() * books);
		randomnumber = randomnumber + 1;
		
		switch(randomnumber)
			{
			case 1:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 2:
				document.write('<a href="http://www.ontri.com/" target="_blank"><img src="http://www.trifind.net/b/ontri/ss.jpg"');
				document.write(' border="0"');
				document.write(' alt="click for more info"></a>');
				break;
			case 3:
				document.write('<a href="http://www.portlandtri.com/c.php?code=1" target="_blank"><img src="http://www.trifind.net/b/musselman/or/SS-8-01-09.gif"');
				document.write(' border="0"');
				document.write(' alt="portland tri"></a>');
				break;
			case 4:
				document.write('<a href="http://www.bamtriathlon.com/" target="_blank"><img src="http://www.trifind.net/b/BAM/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="triathlon, duathlon, expo, more ...."></a>');
				break;
			case 5:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 6:
				document.write('<a href="http://www.bamtriathlon.com/" target="_blank"><img src="http://www.trifind.net/b/BAM/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="triathlon, duathlon, expo, more ...."></a>');
				break;
			case 7:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 8:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 9:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 10:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 11:
				document.write('<a href="http://www.bamtriathlon.com/" target="_blank"><img src="http://www.trifind.net/b/BAM/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="triathlon, duathlon, expo, more ...."></a>');
				break;
			case 12:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 13:
				document.write('<a href="http://www.peakinspiration.com/msindex.htm" target="_blank"><img src="http://trifind.net/b/peak-mile-stones/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="running, biking, triathlon"></a>');
				break;
			case 14:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 15:
				document.write('<a href="http://www.trifind.com/" target="_blank"><img src="http://www.trifind.net/banner.gif"');
				document.write(' border="0"');
				document.write(' alt="The World\'s Largest Triathlon Calendar"></a>');
				break;
			case 16:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 17:
				document.write('<a href="http://www.bamtriathlon.com/" target="_blank"><img src="http://www.trifind.net/b/BAM/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="triathlon, duathlon, expo, more ...."></a>');
				break;
			case 18:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 19:
				document.write('<iframe src="http://www.trifind.net/b/title/SS/1.html" width=728 height=90 frameborder=0 scrolling=no marginwidth=0 marginheight=0></iframe>');
				break;
			case 20:
				document.write('<a href="http://www.bamtriathlon.com/" target="_blank"><img src="http://www.trifind.net/b/BAM/SS.gif"');
				document.write(' border="0"');
				document.write(' alt="triathlon, duathlon, expo, more ...."></a>');
				break;
			}