deepBind for object methods at any depth with any context

deepBind.js

function deepBind(O){
    for(var key in O)
        // if value is an object, go deeper
        if( O[key] instanceof Object && typeof O[key] == 'object' )
            deepBind.call(this, O[key])

        // look for a value which is a function and bind it
        else if( typeof O[key] == 'function' )
            O[key] = O[key].bind(this);
}

Usage:

deepBind.call(this, objectWithDeepMethods);