Problem while updating the div tag

Question

i have 2 pages, Login page and Contents page

--Login.php I have a div with a message 'hi'

--Contents.php I have a logout button, clicking on which calls a javascript function logout()

--Javascript function

function logout(){
window.location='logout.php';
}

--logout.php

header('Location:Login.php');
exit;

After clicking on logout button in Contents.php page it switches successfully to Login.php page but i am not able to update the div in Login.php page

We need more info on how you're trying to update the div currently — rcapote, May 30 '11 at 08:28
i am not able to update the div currently. In the javascript function i.e. after window.location='logout.php' i am using document.getElementById('messageid').innerHTML='new message'; — user475685, May 30 '11 at 08:43
are you trying to update the login.php page from a script in the contents.php page? once you've done that first redirect, to the logout.php page, everything else is pretty much ignored — Beno, May 30 '11 at 09:04
When i logout , i am switching to the login page and i am not able to update the div in the login page using document.getElementById. Is there any way by which i can do it? — user475685, May 30 '11 at 09:05

score 2 · Answer 1 · answered May 30 '11 at 08:58

2

JavaScript runs on the page it appears on.

When you send the browser to another page (e.g. by setting location), you are going to a new page and any scripts running on the current page stop.

answered May 30 '11 at 08:58

Quentin

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It isn't clear what "it" actually is. Presumably you can know whatever condition it is on the server and do the work there. – Quentin May 30 '11 at 09:01
When i logout , i am switching to the login page and i am not able to update the div in the login page using document.getElementById. Is there any way by which i can do it? – user475685 May 30 '11 at 09:03
not from the script in the contents.php page, in any case. @Quentin is right. I'm not sure we can help without getting more details about your setup – Beno May 30 '11 at 09:06
Not from the page you were on. You need to step back and solve the problem instead of trying to get a particular technical implementation to work. You haven't said what that problem is though. – Quentin May 30 '11 at 09:07

score 0 · Answer 2 · edited May 23 '17 at 11:50

what if you did this:

on your logout.php page:

header('Location:Login.php?logout=true');
exit;

then on your login page: (using How can I get query string values in JavaScript?)

<script type="text/javascript">
    if (getParameterByName("logout") == "true") {
        document.getElementById("messageid").innerHTML = "Your message";
    }

    function getParameterByName( name )
    {
      name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
      var regexS = "[\\?&]"+name+"=([^&#]*)";
      var regex = new RegExp( regexS );
      var results = regex.exec( window.location.href );
      if( results == null )
        return "";
      else
        return decodeURIComponent(results[1].replace(/\+/g, " "));
    }

</script>

Problem while updating the div tag

2 Answers2