https://www.jensenit.com/libraries/daxle/core/js/includes/mspopup.js

1function PopupCenter(url, title, w, h) {
2    // Fixes dual-screen position                         Most browsers      Firefox
3    var dualScreenLeft = window.screenLeft != undefined ? window.screenLeft : screen.left;
4    var dualScreenTop  = window.screenTop != undefined ? window.screenTop : screen.top;
5
6    width  = window.innerWidth ? window.innerWidth : document.documentElement.clientWidth ? document.documentElement.clientWidth : screen.width;
7    height = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : screen.height;
8
9    var left      = ((width / 2) - (w / 2)) + dualScreenLeft;
10    var top       = ((height / 2) - (h / 2)) + dualScreenTop;
11    var newWindow = window.open(url, title, 'scrollbars=yes, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left);
12
13    // Puts focus on the newWindow
14    if (window.focus) {
15        //newWindow.focus();
16    }
17	newWindow.onunload = function () {
18		//alert("Page will Reload!");
19  			//window.parent.popupClosing();
20	};
21	
22//	/**/var timer = setInterval(function() {   
23 //   if(newWindow.closed) {  
24 //       clearInterval(timer);  
25 //       confirm("Page will Reload!");
26//		window.parent.popupClosing(); 
27 //   }  
28//	}, 2000);
29	
30}
31
32function popupClosing() {	
33	
34  window.location.href = window.location.href;
35}