json data alerting undefined : i have this json via ajax
>[{"tid":"1","itemID":"Camry","item_type":"Carf","vendor_id":"ogbueli"},{"tid":"2","itemID":"Samsung","item_type":"Electronics","vendor_id":"Chizoba"},{"tid":"3","itemID":"Panasonic","item_type":"Electronics","vendor_id":"Mourinho"}]

i have already parsed it

      arr = JSON.parse(response);

now i want to access it like this

              for (var i in arr){
				newitems=arr[0];
				alert(newitems);
			}
the alert is returning 'undefined'.

i want to get something like this

    newitems={'1','camry','carf','ogbueli'};

hope someone can help me out...thanks