Best way to use Google's hosted jQuery, but fall back to my hosted library on Google fail

Question

What would be a good way to attempt to load the hosted jQuery at Google (or other Google hosted libs), but load my copy of jQuery if the Google attempt fails?

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Answer 1

Using Razor syntax in ASP.NET, this code provides fallback support and works with a virtual root:

@{var jQueryPath = Url.Content("~/Scripts/jquery-1.7.1.min.js");}

Or make a helper (helper overview):

@helper CdnScript(string script, string cdnPath, string test) {
    @Html.Raw("" +
        "")
}

and use it like this:

@CdnScript("jquery-1.7.1.min.js", "ajax/jQuery", "window.jQuery")
@CdnScript("jquery.validate.min.js", "ajax/jquery.validate/1.9", "jQuery.fn.validate")