var index = 0;
banners = new Array();

banners[ index++ ] = '<img src="img/top01.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top02.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top03.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top04.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top05.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top06.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top07.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top08.jpg" width="753" height="124" border="0" usemap="#Map">';
banners[ index++ ] = '<img src="img/top09.jpg" width="753" height="124" border="0" usemap="#Map">';

function RandomCero( N )
{
  return Math.floor( N * Math.random() );
}

var num = RandomCero( banners.length );
document.write( banners [ num ] );

