//Global variables
xMousePos = 0; // Horizontal position of the mouse on the screen
yMousePos = 0; // Vertical position of the mouse on the screen
xMousePosMax = 0; // Width of the page
yMousePosMax = 0; // Height of the page

function captureMousePosition(e) {
  if (document.layers) {
      // When the page scrolls in Netscape, the event's mouse position
      // reflects the absolute position on the screen. innerHight/Width
      // is the position from the top/left of the screen that the user is
      // looking at. pageX/YOffset is the amount that the user has 
      // scrolled into the page. So the values will be in relation to
      // each other as the total offsets into the page, no matter if
      // the user has scrolled or not.
      xMousePos = e.pageX;
      yMousePos = e.pageY;
      xMousePosMax = window.innerWidth+window.pageXOffset;
      yMousePosMax = window.innerHeight+window.pageYOffset;
  } else if (document.all) {
      // When the page scrolls in IE, the event's mouse position 
      // reflects the position from the top/left of the screen the 
      // user is looking at. scrollLeft/Top is the amount the user
      // has scrolled into the page. clientWidth/Height is the height/
      // width of the current page the user is looking at. So, to be
      // consistent with Netscape (above), add the scroll offsets to
      // both so we end up with an absolute value on the page, no 
      // matter if the user has scrolled or not.
      xMousePos = window.event.x+document.body.scrollLeft;
      yMousePos = window.event.y+document.body.scrollTop; 
      xMousePosMax = document.body.clientWidth+document.body.scrollLeft;
      yMousePosMax = document.body.clientHeight+document.body.scrollTop;
  } else if (document.getElementById) {
      // Netscape 6 behaves the same as Netscape 4 in this regard 
      xMousePos = e.pageX;
      yMousePos = e.pageY;
      xMousePosMax = window.innerWidth+window.pageXOffset;
      yMousePosMax = window.innerHeight+window.pageYOffset;
  }  
}

// Mouse Position
if (document.layers) { // Netscape
	document.captureEvents(Event.MOUSEMOVE);
	document.onmousemove = captureMousePosition;
} else if (document.all) { // Internet Explorer		
	document.onmousemove = captureMousePosition;  
} else if (document.getElementById) { // Netcsape 6
	 document.onmousemove = captureMousePosition;
}