HTML: The Markup Language (an HTML language reference). « input typereset input typehidden ».Specifies that its input element represents a list of file items. The types are: button checkbox file hidden image password radio reset submit text Any number of input tags can be placed anywhereIn other words, the key down event occurred while the HTML element was in focus. Whenever you press down the key, the script code of the onkeydown is executed. When you specify "file" for the type attribute of this element, a file selection box is created. < input type"file" name"example1">.HTML - method and action URL. HTML - the MIME type. CSS - width and height of a form field.