SetTimeout function not working in chrome

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Javascript

Hai Friends,

i called one javascript inbuilt function setTimeout('SessionWarning()', 2000).This function singout ma application after 2000 milleseconds.This function working fine in Firefox but not good in Chrome..my complete code shown in the following

<script language="javascript" type="text/javascript" charset="utf-8">


      var authorized = "<%= HttpContext.Current.User.Identity.IsAuthenticated.ToString().ToLower() %>";
      if (getAbsolutePath().toLowerCase() == 'sessionexpired.aspx') {
          authorized = "false";
          //alert(authorized);
      }
      if (authorized == "true") {
          var sessionTimeoutWarning = "<%= Session.Timeout %>";
          sessionTimeoutWarning = sessionTimeoutWarning - 1;
          var sessionTimeout = "<%= Session.Timeout %>";
          var sTimeout = parseInt(sessionTimeoutWarning) * 60 * 1000;
          setTimeout('SessionWarning()', sTimeout);


          function SessionWarning() {
              var message = "Your session will expire in another " + (parseInt(sessionTimeout) - parseInt(sessionTimeoutWarning)) + " minute(s)! Please respond before the session expires";
              alert(message);

          }
      }
  </script

>

This function automatically goes to sessionexpired page after specified time in firefox..but in chrome the alert will stay indefintly.if u check alert then it will automatically timeout..

please Help me
Thanks advnc
Aatif-Bangalore