> 
> **Possible Duplicate:**  
> 
> [Javascript Object.Watch for all browsers?](https://stackoverflow.com/questions/1029241/javascript-object-watch-for-all-browsers) 
> 
> 
> 

I just read Mozilla's documentation for the [watch() method](https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Object/watch). It looks very useful.

However, I can't find something similar for Safari. Neither Internet Explorer.

How do you manage portability across browsers?