https://ntconnections.net/js/popup.js

1function setCookie(cname, cvalue, exdays) {		
2	var d = new Date();
3	d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
4	var expires = "expires=" + d.toUTCString();
5	document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
6}
7
8function getCookie(cname) {
9	var name = cname + "=";
10	var decodedCookie = decodeURIComponent(document.cookie);
11	var ca = decodedCookie.split(';');
12	for (var i = 0; i < ca.length; i++) {
13		var c = ca[i];
14		while (c.charAt(0) == ' ') {
15			c = c.substring(1);
16		}
17		if (c.indexOf(name) == 0) {
18			return c.substring(name.length, c.length);
19		}
20	}
21	return false;
22}
23$(document).ready(function () {
24
25	var html_element = $('html');
26	html_element.on('mouseleave', function(event) {
27		if(!getCookie("popup") && !$('.preventExit').is(":visible"))
28			$('#lead-modal').modal({show: true,backdrop: "static"});
29	});
30		
31	// setTimeout(function(){
32	// 	if(!getCookie("popup"))
33	// 		$('#lead-modal').modal({show: true,backdrop: "static"});
34	// }, 2*60*1000);  // 2 minutes
35
36	$("#lead-modal .modal-head #restore-modal").click(function () {
37		if ($(this).hasClass("minimize")) {
38			$(this).removeClass("minimize").addClass("maximize");
39			$("#lead-modal").addClass("minimized");
40			$(".modal-backdrop").remove();
41
42		}
43		else if ($(this).hasClass("maximize")) {
44			$(this).removeClass("maximize").addClass("minimize");
45			$("#lead-modal").removeClass("minimized");
46			$("body").append('<div class="modal-backdrop show">></div>');
47		}
48	});
49	$("#lead-modal").on('hide.bs.modal', function () {
50		setCookie('popup','closed', 7);
51		$(this).removeClass("maximize").addClass("minimize");
52		$("#lead-modal").removeClass("minimized");
53		$(".modal-backdrop").remove();
54	});
55});