how to make html input not autofill

1<form method="post" action="/post/" autocomplete="off">
2	<!-- The entire form has autocomplete disabled. -->
3</form>
4
5<!-- or you turn it off for just one input -->
6<input type="text" autocomplete="off">

1<input type="text" autoComplete="off" />

1<form method="post" action="/form" autocomplete="off">
2[…]
3</form>

1someForm.setAttribute( "autocomplete", "off" ); 
2someFormElm.setAttribute( "autocomplete", "off" );
3