C# WP8.1 WebView set focus on a HTML DOM element to zoom and bring up keyboard

Any way in WP8.1 to set focus on a HTML DOM element from code-behind so that a WebView automatically zooms to focus on the element and bring up the on-screen keyboard?

Currently doing something like this:

    private async void WebView_DOMContentLoaded(WebView sender, WebViewDOMContentLoadedEventArgs args) {
        try {
            await WebView.InvokeScriptAsync("eval", new string[] { "document.getElementsByName('some_input')[0].focus();" }); // fpcus
            await WebView.InvokeScriptAsync("eval", new string[] { "document.getElementsByName('some_input')[0].click();" }); // click
        } catch (Exception) { }
    }

But the WebView does not zoom or bring up the on-screen keyboard. It simply "focuses" on the element (showing a focused input border).

Any help would be greatly appreciated.

Thanks.