EveryOne Min Script is called

In my MVC application, when I run my application when I didn't do any changes in my application the scripts work and goes to the to login page after one min (to test the script I have default set -1 to the sessiontimeout so it will be easy to check script working or not) , now my issue is when I contionusly go on working in my appication also it's redirecting to login page do how to modify this script:

<script type="text/javascript">

function keepAlive() {  
    window.clearTimeout(window.sessionKeepAlive);  
    window.sessionKeepAlive = window.setTimeout( function() {  
        window.location.href = '<%= Url.Action( "LogOn", "Account" ) %>'; 
    }, 开发者_Go百科<%= (Session.Timeout - 19) * 60 * 1000 %>);  
} keepAlive();

</script>

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Well, the typical (default) session timeout is 20 minutes, and you're subtracting 19...I think you want to just subtract 1 here so you get 60 seconds notice, so this:

<%= (Session.Timeout - 19) * 60 * 1000 %>

Should be:

<%= (Session.Timeout - 1) * 60 * 1000 %>