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As I understand it, the <input type=email> element in HTML5 will render as a simple text field in browsers that do not support the tag. On other browsers it will render properly, like on the iPhone it will bring up the e-mail keyboard layout.
I’d like to use this in a project but my input fields are <asp:TextBox> controls. How can I use the HTML5 element but still access its data server-side like the rest of my fields?
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Its size and maxlength attributes are both set to 64 in order to show room for 64 characters worth of e-mail address, and to limit the number of characters actually entered to a maximum of 64. The required attribute is specified, making it mandatory that a valid e-mail address be provided.
The <input type="email"> defines a field for an e-mail address. The input value is automatically validated to ensure it is a properly formatted e-mail address. To define an e-mail field that allows multiple e-mail addresses, add the "multiple" attribute.
HTML 5 introduces several input types like Date, DateTime-local, time, week, month, email, tel, URL, search, range, color and number. To improve the user experience and to make the forms more interactive. However, if a browser failed to recognize these new input types, it will treat them like a normal text box.
There is an update for .NET framework 4 which allows you to specify the type attribute
http://support.microsoft.com/kb/2468871.
See feature 3 way down the page
Feature 3
New syntax lets you define a TextBox control that is HTML5 compatible. For example, the following code defines a TextBox control that is HTML5 compatible:
<asp:TextBox runat="server" type="some-HTML5-type" />
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