huazilin wrote:
Are there three methods in What your above suggestion or one method
,but need three steps for eventually solve the problem?

There are two problems that need to be solved:

1)  How to get the security manager to allow creation of a JS wrapper for you
    C++ object.
2)  How to expose a constructor for that object to JS.

To solve #1, you need to either have classinfo or implement nsISecurityCheckedComponent appropriately.

To solve #2, you want to attach a constructor to the global object.

If you have time and have  some
implementing examples send to me ,I will appreciate you very very much.

The XMLHttpRequest implementation in Gecko 1.8.0.x _is_ an implementation 
example.

May be you could give me a simple example

There isn't one that I know of...

-Boris
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