comet

Clrs=new Array('ff0000','00ff00','ffffff','ff00ff','ffa500','ffff00','00ff00','ffffff','ff00ff')
yBase=0;
xBase=0;
step=3;
currStep=0;
Ypos=0;
Xpos=0;
delta = -1
if (NS4) {
  document.write('<LAYER NAME="n" LEFT=0 TOP=0 CLIP="0,0,3,3"><\/LAYER>');
  window.captureEvents(Event.MOUSEMOVE);
  function nMouse(evnt) {
    Ypos = evnt.pageY;
    Xpos = evnt.pageX;
  }
  window.onMouseMove = nMouse;
} else if (IE4) {
  document.write('<div id="e" style="position:absolute;top:0;left:0"><div style="position:relative">');
  document.write('<div id="me" style="position:absolute;top:0;left:0;width:25;height:25;text-align:center"><B>o<\/B><\/div>')
  document.write('<\/div><\/div>');
  function iMouse() {
    Ypos=event.y;
    Xpos=event.x;
  }
  document.onmousemove = iMouse;
} else if (IE5) {
  document.write('<div id="e" style="position:absolute;top:0;left:0"><div style="position:relative">');
  document.write('<div id="me" style="filter:glow(strength=0;enabled=1);position:absolute;top:0;left:0;width:25;height:25;text-align:center"><B>.<\/B><\/div>')
  document.write('<\/div><\/div>');
  function iMouse() {
    Ypos=event.y;
    Xpos=event.x;
  }
  document.onmousemove = iMouse;
} else if (NS6) {
  document.write('<div id="e" style="position:absolute;top:0;left:0"><div style="position:relative">');
  document.write('<div id="me" style="position:absolute;top:0;left:0;width:25;height:25;text-align:center"><B>.<\/B><\/div>')
  document.write('<\/div><\/div>');
  function nMouse(evnt) {
    Ypos = evnt.pageY
    Xpos = evnt.pageX
  }
  document.onmousemove = nMouse;
}
function Comet() {
  if (!NS4 && !NS6 && !IE4 && !IE5) return
  if (NS4) {
    var yBase=window.innerHeight/4;
    var xBase=window.innerWidth/4;
    var layer=document.layers['n']
  }
  if (IE4 || IE5) {
    document.all.e.style.top=document.body.scrollTop;
    var yBase=window.document.body.clientHeight/4;
    var xBase=window.document.body.clientWidth/4;
    var layer=document.all.me.style
  }
  if (NS6) {
    var yBase=window.innerHeight/4;
    var xBase=window.innerWidth/4;
    var layer=document.getElementById('me').style;
  }
  // layer.top =Ypos + yBase*Math.cos((currStep+14*4)/12)*Math.cos(0.7+currStep/200);
  // layer.left=Xpos + xBase*Math.sin((currStep+14*3)/10)*Math.sin(8.2+currStep/400);
  var y1 = Ypos + yBase*Math.cos((currStep+14*4)/12);
  var x1 = Xpos + xBase*Math.sin((currStep+14*3)/10);
  if (NS6) {
    if (y1 > window.innerHeight+window.pageYOffset-40) {
      y1 = window.innerHeight+window.pageYOffset-40
    }
    if (x1 > window.innerWidth+window.pageXOffset-40) {
       x1 = window.innerWidth+window.pageXOffset-40  // prevent scroll bar toggle
    }
  }
  layer.top  = y1
  layer.left = x1

Muskegon Astronomical Society, Comet