Why are the buttons of the type submit?

Th开发者_如何学编程is is the html:

<button>Static</button>
<form>
<span id="test"> </span>
</form>

This is the jQuery - runs in the document.ready:

    $('#test').append('<button>Dynamic</button>');

    $('button').live('click', function(){
       alert($(this).attr('type')); 
    });

    //even this one:
    alert($('<button>test</button>').attr('type'));

The it alerts it says the 'type' is 'submit', but I haven't specified a type. How come? At least IE and Chrome are consequent in giving it the type "submit". But I don't even have a form, so it seems weird to make it a submit-button.

The default value for the type attribute for <button> elements is defined as 'submit' in the specification.

submit: Creates a submit button. This is the default value.

http://www.w3.org/TR/html4/interact/forms.html#h-17.5