$(function() {
    $(document).everyTime(1000,function() {
        $.ajax({
            url: baseUrl + "Home/GetInstantMessage",
            cache: false,
            dataType: "json",
            success: getInstantMessage
        });
    });
});

function getInstantMessage(sender)
{
    if (sender != null)
    {
        if (window.confirm(sender[1] + ' invites you to a chat room. Do you accept the invitation?'))
        {
            $.post(baseUrl + "Home/AcceptInstantMessage", sender[0], null, "json");
            window.location = baseUrl + "Chat";
        }
    }
}