var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
txt="";
//url="http://www.buffalo.edu/dalai_lama/";
alt="";
banner="images/sidebar_squares.jpg";
//banner="images/UB_DalaiLama_logo.jpeg";
width="117";
height="117";
align="center";
}
if (ad==2) {
txt="";
//url="http://www.buffalo.edu/dalai_lama/";
alt="";
banner="images/sidebar_squares1.gif";
//banner="images/UB_DalaiLama_logo.jpeg";
width="117"; // original is 117 X 117
height="117";
align="center";
}
if (ad==3) {
txt="";
//url="http://www.buffalo.edu/dalai_lama/";
alt="";
banner="images/sidebar_squares2.gif";
//banner="images/UB_DalaiLama_logo.jpeg";
width="117";
height="117";
align="center";
}
if (ad==4) {
txt="";
//url="http://www.buffalo.edu/dalai_lama/";
alt="";
banner="images/sidebar_squares3.gif";
//banner="images/UB_DalaiLama_logo.jpeg";
width="117";
height="117";
align="center";
}


document.write('<center><a href=\"' + url + '\" target=\"_top\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=0><br>');
document.write('<small>' + txt + '</small></a></center>');