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Creating validating processing html forms

See the section on form submission for usage information.

for input data that is accepted by the server processing this form.

HTML defines the following control types: attribute is set.

When a form is submitted, only "on" checkbox controls can become successful.

When the submit button is activated, the form will be sent to the program specified by the The following example shows how the contents of a user-specified file may be submitted with a form.

The user is prompted for his or her name and a list of file names whose contents should be submitted with the form.

The This attribute specifies which HTTP method will be used to submit the form data set.

Possible (case-insensitive) values are "get" (the default) and "post".

User agents may interpret this value as the character encoding that was used to transmit the document containing this This attribute specifies a comma-separated list of content types that a server processing this form will handle correctly.User agents may use this information to filter out non-conforming files when prompting a user to select files to be sent to the server (cf.the but the input text is rendered in such a way as to hide the characters (e.g., a series of asterisks).Each control has both an initial value and a current value, both of which are character strings.Please consult the definition of each control for information about initial values and possible constraints on values imposed by the control.

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The If no radio button in a set sharing the same control name is initially "on", user agent behavior for choosing which control is initially "on" is undefined. Since existing implementations handle this case differently, the current specification differs from RFC 1866 ([RFC1866] section, which states: Authors may create controls that are not rendered but whose values are submitted with a form.