如何保持会话活跃，即使我在同一浏览器的多个选项卡中打开

我想实现一件事。我用多个标签打开我的网站。当我在一个选项卡中工作时，其他选项卡不应该超时。它应该是活的。如何为其他标签保持活力。我使用下面的js来查找空闲时间注销。

<script type="text/javascript">
idleTime = 0;
$(document).ready(function () {
    //Increment the idle time counter every minute.
    var idleInterval = setInterval("timerIncrement()", 60000); // 1 minute
    //Zero the idle timer on mouse movement.
    $(this).mousemove(function (e) {
        idleTime = 0;
    });
    $(this).keypress(function (e) {
        idleTime = 0;
    });
})
function timerIncrement() {
    idleTime = idleTime + 1;
    if (idleTime > 2) { // 30 minutes
        var beforeTime = new Date()
        var bminutes = beforeTime.getMinutes();
        var bseconds = beforeTime.getSeconds(); 
        var user='<?php echo Auth::getSessionUserFullName();?>';
        if(user!='')
        {
            var timehours=beforeTime.getHours();
            var timeoutmin=bminutes+1;
            var timeoutseconds=bseconds-1;
            if(timeoutseconds>59)
            {
                timeoutseconds=0;
                timeoutmin=timeoutmin+1;
            }
            if(timeoutmin>59)
            {
                timeoutmin=0;
                timehours=hours+1;
            }
            if(timehours>24)
            {
                timehours=0;
            }
          var ok=confirm("Your session  expire time started at "+beforeTime.getHours()+":"+beforeTime.getMinutes()+":"+beforeTime.getSeconds()+".Please click 'OK' before "+timehours+":"+timeoutmin+":"+timeoutseconds+" to stay signed in.");
        if(ok)
        {
            var currentTime = new Date()
            var aminutes = currentTime.getMinutes();
            var aseconds = currentTime.getSeconds();
            var time=aminutes-bminutes;
            if(aminutes>bminutes && aseconds>bseconds)
            {
                alert('Time out!!Please login again to access.');
                window.location.href='<? echo APPLICATION_WEBROOT?>auth/logout';
                return false;
            }
            else if(time>=2)
            {
                alert('Time out!!Please login again to access.');
                window.location.href='<? echo APPLICATION_WEBROOT?>auth/logout';
                return false;
            }
            else 
            {
                return true;
            }
        }
        else 
        {
            window.location.href='<? echo APPLICATION_WEBROOT?>auth/logout';
        }
        }
    }
}
</script>

请帮帮我。如何为所有打开的选项卡保持会话。提前感谢