function wait(show)
{
    if(show) 
    {
        document.body.style.cursor = "wait";
        $find('MPEB_Wait').show();
    }
    else 
    {
        $find('MPEB_Wait').hide();
        document.body.style.cursor = "default";
    }
}

function initPage() 
{
    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequestHandler);
    Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(beginRequestHandler);
}

function endRequestHandler(sender, args)
{
    wait(false);
}

function beginRequestHandler(sender, args)
{
    wait(true);
}