var mess = new Array('<img src="_images/photo_home1.jpg" alt="Wind Farm Survey in South Dakota" width="422" height="312">','<img src="_images/photo_home2.jpg" alt="Rockshelter Excavation" width="422" height="312">','<img src="_images/photo_home3.jpg" alt="Historic Dugout" width="422" height="312">','<img src="_images/photo_home4.jpg" alt="Battlefield Survey in North Dakota" width="422" height="312">','<img src="_images/photo_home5.jpg" alt="Pottery sherd" width="422" height="312">','<img src="_images/photo_home6.jpg" alt="Construction Monitoring and Excavation in North Dakota" width="422" height="312">','<img src="_images/photo_home7.jpg" alt="Mapping in Utah" width="422" height="312">','<img src="_images/photo_home8.jpg" alt="Construction monitoring and salvage in Wyoming" width="422" height="312">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);