Get Partylist/Lookup field id in CRM 2011 using Javascript

var lookup = new Array();
        lookup = Xrm.Page.getAttribute("to").getValue();
        for (var indxAttendees = 0; indxAttendees < lookup.length; indxAttendees++) {
        var lookupId = lookup[indxAttendees].id;
        var lookupName=lookup[indxAttendees].name;
        var lookupType=lookup[indxAttendees].entityType;
}