var ad = Math.round(Math.random()*4)

if (ad==0) {
	banner="banner1.jpg";
}

if (ad==1) {
	banner="banner2.jpg";
}

if (ad==2) {
	banner="banner3.jpg";
}

if (ad==3) {
	banner="banner4.jpg";
}

if (ad==4) {
	banner="banner5.jpg";
}

function showBanner( imagePath )
{
	document.write('<p><img src="'+ imagePath + banner +'" width="682" height="188" title="Defense Metals Technology Center" alt="Defense Metals Technology Center" /></p>');
}