Disable native datepicker

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Is there any way to disable the native datepicker in Opera (and now Chrome) on <input type=date> elements? I know an obvious solution would be to use <input type=text> but that's not exactly what I'm looking for. A JavaScript solution is fine (it might be the only way to do it), as I really don't care if the datepicker comes up if the user has JavaScript disabled. It is currently clashing with the jQuery UI Datepicker element and I've done some extensive googling with little success. I've tried e.preventDefault() but that doesn't work for some reason.