//preload the rotating images
i01 = new Image();
i01.src = "/images/system/1.gif";
i02 = new Image();
i02.src = "/images/system/2.gif";
i03 = new Image();
i03.src = "/images/system/3.gif";
i04 = new Image();
i04.src = "/images/system/4.gif";
i05 = new Image();
i05.src = "/images/system/5.gif";
i06 = new Image();
i06.src = "/images/system/6.gif";

//randomly select image
var imageArray = new Array('1.gif','2.gif','3.gif','4.gif','5.gif','6.gif');
var imageArrayLength = imageArray.length;
var randomImage = Math.floor(Math.random()*imageArrayLength);