var txtList = new Array()
var txtDesc = new Array()

txtList[txtList.length]="<img src='images/geobanner07a.jpg' alt='Department of Geography' border='0'>";
txtList[txtList.length]="<img src='images/geobanner07b.jpg' alt='Department of Geography' border='0'>";
txtList[txtList.length]="<img src='images/geobanner07c.jpg' alt='Department of Geography' border='0'>";
txtList[txtList.length]="<img src='images/geobanner07d.jpg' alt='Department of Geography' border='0'>";


j=parseInt(Math.random()*txtList.length);
j=(isNaN(j))?0:j;

document.write(txtList[j]);