function banner() {} ; b = new banner() ; n = 0
b[n++]= "<img src='http://www.fishex.com/quality/banners/728x60-hal1.gif' border='0'>"
b[n++]= "<img src='http://www.fishex.com/quality/banners/728x90-bc1.gif' border='0'>"
b[n++]= "<img src='http://www.fishex.com/quality/banners/728x90-sea1.gif' border='0'>"
b[n++]= "<img src='http://www.fishex.com/quality/banners/728x90-shrimp1.gif' border='0'>"
b[n++]= "<img src='http://www.fishex.com/quality/banners/728x90-snow1.gif' border='0'>"
b[n++]= "<img src='http://www.fishex.com/quality/banners/kc-gifts1b.gif' border='0'>"
i=Math.floor(Math.random() * n) ; 
document.write( b[i] )