Ajax object readystate property

Four readystate propeties are available for ajax object,
0 - Uninitialized
> Object is not initialized with data.
1 - Loading
> Object is loading its data.
2 - Loaded
> Object has finished loading its data.
3 - Interactive
> User can interact with the object even though it is not fully loaded.
4 - Complete
> Object is completely initialized.