Openlayers draw feature : save map state

Question

I am a newbie in Openlayers API. I am using the Draw Features. I grabbed the source code of this page: Draw Features
Now I want to add the save button to the webpage so I can continue working on the same edited map.
Please help.
Thank you so much !!

Answer 1

You can use vector formats with GeoJSON. Did you try this? http://openlayers.org/dev/examples/vector-formats.html