- (void)didCreateJavaScriptContext:(JSContext *)jsContext
{
    // Get the context for the main frame and verify it's the same
    JSContext *mainFrameCtx = [self valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
    if(jsContext == mainFrameCtx) {
        // Call the delegate
        if(self.delegate && [self.delegate respondsToSelector: @selector(webView:didCreateJavaScriptContext:)] ) {
            [(id<TSWebViewDelegate>)self.delegate webView:self didCreateJavaScriptContext:jsContext];
        }
    }
    else {
        NSLog(@"JavaScript contexts are different");
    }
}