Too much information

Actually taken from the JS v1.4 Guide and modified to be a little more useful:

function showme(obj, obj_name) {
   var result = ""
   var null_list = "";
   obj_name = (obj_name != '')? obj_name: 'obj';
   for (var i in obj) {
		if(obj[i] != null && obj[i] != '')
			result += obj_name + "." + i + " = " + obj[i] + "\n";
		else
			null_list += i + ", ";
   }
   return result + "\n NULL propertys: \n" + null_list;
}

Pass it an object you want to see the properties of and it will show them to you. Like so:

alert(showme(item[i]));