var mess = new Array
('<img border=1 src="images/PageBanners/SGABanner01.gif" width="600" height="100">','<img border=1 src="images/PageBanners/SGABanner02.gif" width="600" height="100">','<img border=1 src="images/PageBanners/SGABanner03.gif" width="600" height="100">',
'<img border=1 src="images/PageBanners/SGABanner04.gif" width="600" height="100">','<img border=1 src="images/PageBanners/SGABanner05.gif" width="600" height="100">','<img border=1 src="images/PageBanners/SGABanner06.gif" width="600" height="100">',
'<img border=1 src="images/PageBanners/SGABanner07.gif" width="600" height="100">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);