function PBSMultichannelEpisodeWindowPopUp(params){
        this.name="pbsparentwindow";
        var url = "http://www.pbs.org/modules/tvschedules/includes/programinfopopup.html?display_format=ep_description&";
        url = url + params;
        var a="toolbar=no,location=no,directories=no,menubar=no,scrollbars=yes,resizable=yes,width=605,height=450";
        if (navigator.appName.indexOf("Microsoft")>=0) a+=",left=50,top=50";
        else a+=",screenX=50,screenY=50";
        if( floater != null )
                if( floater.closed == false )
                        floater.close();
                        var floater = null;
        floater=window.open(url,"ProgramInformation",a);
        floater.focus();
}