I keep getting HTML5 syntax errors with MVC3

Are these kind of errors valid and how can I resolve. Doesn't HTML5 allow this code?

<button title="" disabled="disabled" >&gt;开发者_C百科&gt;</button>

Validation: (HTML5) - the values permitted for this attribute do not include 'disabled'

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Check Web Standards Update for Microsoft Visual Studio 2010 SP1 that improves html5/css3 validation and intellisense support.

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I also had to change my Text-Editor preferences to get VS to recognize the HTML5 controls (for others that arrive here via Google like me).

In VS, go to Tools > Options and select TextEditor/HTML/Validation on the left pane, then select HTML5.

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disabled is a valid html5 property for button. However, you should always specify type on buttons, as different browsers use different defaults. Validation may be reporting that omission in a roundabout way.