$(document).ready(function() {
    userSessionCheck();
    setInterval("userSessionCheck()", session_poll);
});

function userSessionCheck() 
{
    $.ajax({
        url: BaseHref + '/check',
        cache: false,
        success: function(data){
            if (data==='0')
            {
                window.location.href=BaseHref+'/force_out';
            }
        }
    });
}