/* Show an object */
      function showObject(object) {
      object.visibility = VISIBLE;
      }
      
      /* Hide an object */
      function hideObject(object) {
      object.visibility = HIDDEN;
      }
      
      /* Slide the M181 logo from top to middle */
      function slideLogo(from, to) {
      if (from < to) {
      course.top = (from += 10);
      setTimeout('slideLogo(' + from + ',' + to + ')', 75);
      }
      else initObjects();
      }
      
      /* Rotate selected objects */
      function rotateObjects() {
      for (var i = 0; i < pos.length; i++) {
      pos[i] += inc; objects[i].visibility = 'visible';
      objects[i].left = (r * Math.cos(pos[i])) + xoff
      objects[i].top = (.6*r * Math.sin(pos[i])) + yoff;
      }
      rotateTimer = setTimeout("rotateObjects()", 75);
      }
      
      /* Initialize selected objects for rotation */
      function initObjects() {
      /* Here is the array of HTML elements that will be rotated, from fly1 to fly4 
      Just put the shortcut variables to the HTML elements in this little array
      and they will be rotated automatically */
      objects = new Array(fly1, fly2, fly3, fly4);
      pos = new Array();
      pos[0] = 0;
      for (var i = 1; i < objects.length; i++) {
      pos[i] = parseFloat(pos[i - 1] + ((2 * pi) / objects.length));
      }
      rotateObjects();
      }
      
      /* Variables for rotating objects */
      var objects;
      var pos;
      var r = 280;        // radius
      var xoff = 290;     // x offset
      var yoff = 220;     // y offset
      var pi = Math.PI;   // get pi
      var inc = pi / 180; // degrees per rotation cycle
      var objects;        // objects to be rotated
      var pos;            // position for objects
     

/* end of file 
<!--  This srcipt from:   http://www.webreview.com/pub/97/06/27/coder/source.html -->

*/