// Set Netscape up to run the "captureMousePosition" function whenever
// the mouse is moved. For Internet Explorer and Netscape 6, you can capture
// the movement a little easier.
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;
}
// Global variables
var xMousePos = 0; // Horizontal position of the mouse on the screen
var yMousePos = 0; // Vertical position of the mouse on the screen
var xMousePosMax = 0; // Width of the page
var 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.documentElement.scrollLeft;
  yMousePos = window.event.y+document.documentElement.scrollTop;
  xMousePosMax = document.body.clientWidth+document.documentElement.scrollLeft;
  yMousePosMax = document.body.clientHeight+document.documentElement.scrollTop;
  if(navigator.appVersion.indexOf("MSIE 6.")!=-1){
   xMousePos = window.event.x+document.body.scrollLeft;
   yMousePos = window.event.y+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;
 }
}