https://www.j1.ie/siteEngine/js/mouseMovement.js

1/* This code will grab two mouse coordinate sets from the user's mouse.
2 * The first set is shortly after the user starts moving thier mouse across the web page.
3 * The second set is grabbed a specified time later.  The distance between the two sets
4 * is calculated and stored in a form field
5 */
6
7//tell the browser to start executing the timedMousePos function every x milliseconds
8var myInterval = window.setInterval(timedMousePos,250)
9
10// Variables for mouse positions
11var xPos = -1;
12var yPos = -1;
13var firstX = -1;
14var firstY = -1;
15// variable to track how many times I polled the mouse position
16var intervals = 0;
17
18// retrieve mouse x,y coordinates
19function getMousePos(p) {
20	if (!p) var p = window.event;
21	if (p.pageX || p.pageY) {
22		xPos = p.pageX;
23		yPos = p.pageY;
24	}	else if (p.clientX || p.clientY) {
25		xPos = p.clientX + document.body.scrollLeft	+ document.documentElement.scrollLeft;
26		yPos = p.clientY + document.body.scrollTop + document.documentElement.scrollTop;
27	}
28}
29
30// capture mouse movement
31function timedMousePos() {
32	//when the user moves the mouse, start working
33	document.onmousemove = getMousePos;
34	if (xPos >= 0 && yPos >= 0) {
35		//0,0 is a valid mouse position, so I want to accept that.  for this reason
36		//my vars are initialized to -1
37		var newX = xPos;
38		var newY = yPos;
39		intervals++;
40	}
41	if (intervals == 1) {
42		//store the first coordinates when we've got a pair (not when 'intervals' is 0)
43	  firstX = xPos;
44  	firstY = yPos;
45	} else if (intervals == 2) {
46		//I've got two coordinate sets
47		//tell the browser to stop executing the timedMousePos function
48  	clearInterval(myInterval);
49		//send the 4 mouse coordinates to the calcDistance function
50  	calcDistance(firstX,firstY,newX,newY);
51  }
52}
53
54function calcDistance(aX,aY,bX,bY) {
55	//use the Euclidean 2 dimensional distance formula to calculate the distance
56	//in pizels between the coordinate sets
57	var mouseTraveled = Math.round(Math.sqrt(Math.pow(aX-bX,2)+Math.pow(aY-bY,2)));
58	var formfield1234567891 = document.getElementsByName('formfield1234567891');
59	//ajax stuff to set a session variable
60	try	{
61		// Dave Shuck - 26 Mar 2007 - added try/catch for giant pages that take a while to
62		// load, in case the user moves their mouse before the page is completely rendered.
63
64		for(var i = 0; i < formfield1234567891.length; i++) {
65    		formfield1234567891[i].value = mouseTraveled
66		}
67
68		// document.getElementById("formfield1234567891").value = mouseTraveled;
69	}
70	catch(excpt) { /* no action to take */ }
71}
72
73function dummy() {}