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How to detect browser close(x) click in firefox

Posted on 2010-11-17
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Last Modified: 2012-05-10
I have an ASP.NET app
I need to detect when the user clicked the close(x) on the far top right.
I have an onbeforeunload event that triggers the code below. and have the following two questions

A)
This works for IE, Does Firefox recognize the following check, if not what is the equivalent
if ((window.event.clientX < 0) || (window.event.clientY < 0))

B)
Also what is the equivalent XMLHttpRequest object for Firefox

The firefox version I am testing with is
Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 (.NET CLR 3.5.30729)
<script type="text/javascript" language="javascript">

    function logUser() {

        if ((window.event.clientX < 0) || (window.event.clientY < 0)) {

      

             logoutXMLHTTP()

         }



     }

     function logoutXMLHTTP() {

         var xmlHttp;

         try {

             // Firefox, Opera 8.0+, Safari

             xmlHttp = new XMLHttpRequest();

             xmlhttp.open("GET", "AbandonSession.aspx", false); 

             xmlhttp.send();

         }

         catch (e) {

             // Internet Explorer

         try {

               xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");

               xmlhttp.open("GET", "AbandonSession.aspx", false); 

               xmlhttp.send();

             }

         catch (e) {

             try {                                 

               xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

               xmlhttp.open("GET", "AbandonSession.aspx", false);

               xmlhttp.send();

                 }

                 catch (e) {

                     alert("Your browser does not support AJAX!"); return false;

                 }

             }

         }

     }





</script>

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Question by:countrymeister
  • 2
4 Comments
 
LVL 7

Expert Comment

by:deadlyDev
Comment Utility
I know its not exactly an answer to your question... but check out http://jquery.com/ This library lets you write javascript code once (Not changing per browser) and takes care of the differences between browsers for you... Specifically check out the .ajax() method, which will use the XMLHttpRequest object from each of the browsers seamlessly... This framework changed my life!

When it comes to your problem code, you will need only write the code once, and it will work on all [supported] browsers!
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LVL 6

Expert Comment

by:Codebot
Comment Utility
If you are using asp.net then use server side session start and session end
they are more reliable
http://quickstarts.asp.net/QuickStartv20/aspnet/doc/applications/state.aspx
or check this one
http://www.dotnetcurry.com/ShowArticle.aspx?ID=126&AspxAutoDetectCookieSupport=1
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LVL 1

Author Comment

by:countrymeister
Comment Utility
Codebot,

Please note closing the browser is a pure client side event, and not a server side event.
I  need to know if what is the equivalent of window.event.clickX in firefox and the XmlHttp request object for Firefox
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Accepted Solution

by:
Codebot earned 500 total points
Comment Utility
yes use
var e = (window.event) ? window.event : evt;

if (e.clientX < 0 && e.clientY < 0){
{

alert("window closing....");

}

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and for object use
unction GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp;
}

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