var mess = new Array('<img src="images/1.jpg" alt="" height="400" width="543" border="0">','<img src="images/2.jpg" alt="" height="400" width="543" border="0">','<img src="images/3.jpg" alt="" height="400" width="543" border="0">','<img src="images/4.jpg" alt="" height="362" width="543" border="0">','<img src="images/5.jpg" alt="" height="400" width="543" border="0">','<img src="images/6.jpg" alt="" height="400" width="543" border="0">','<img src="images/7.jpg" alt="" height="400" width="543" border="0">');
var max = mess.length;
var num = Math.floor((Math.random() * max));
document.writeln(mess[num]);