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How to control back button in browser

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Join Date: Jun 2009

Posts: 9

Reputation: gshockneo is an unknown quantity at this point

Solved Threads: 0

gshockneo

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Newbie Poster

How to control back button in browser

Jul 8th, 2009

hi
I have a simple log in form.
I want that after user logs in , he should not be able to goto login page again using back button of browser.
Does page reloads fresh when back button is clicked or it simply displays what was earlier.

login.jsp

 Help with Code Tags 
 JSP Syntax (Toggle Plain Text) 
<%
response.setHeader("Cache-Control","max-age=0");
response.setHeader("Pragma","no-cache");
response.setDateHeader("Expires", 0); //prevents caching at the proxy server
%>
<script type="text/javascript">
alert("hi");
</script>
<HTML>
<HEAD> 
</HEAD> 
<BODY>
my page body
<form action="validation.jsp">
<input type="submit">
</form>
</BODY>
</HTML>
<%
response.setHeader("Cache-Control","max-age=0");
response.setHeader("Pragma","no-cache");
response.setDateHeader("Expires", 0); //prevents caching at the proxy server
%>
<script type="text/javascript">
alert("hi");
</script>
<HTML>
<HEAD> 
</HEAD> 
<BODY>
my page body
<form action="validation.jsp">
<input type="submit">
</form>
</BODY>
</HTML>

If user clicks back button of browser , alert("hi") is not executed.it means it simply display the last page.

How can i prevent this.
Thanx in advance

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Join Date: Oct 2008

Posts: 2,562

Reputation: adatapost has much to be proud of

Solved Threads: 454

adatapost

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Posting Maven

Re: How to control back button in browser

Jul 9th, 2009

Read a cookie in login page, Redirect the user if cookies is found. If cookie is not found then allows user to submit username, andpassword. Once, user is authenticated by your system then create a cookie.

Failure is not fatal, but failure to change might be. - John Wooden