Capturing Mouse Position

Capturing Mouse Position:

// 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

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;

  }

}