don't suggest input html code example
Example 1: turn off autocomplete input html
<form method="post" action="/post/" autocomplete="off">
<!-- The entire form has autocomplete disabled. -->
</form>
<!-- or you turn it off for just one input -->
<input type="text" autocomplete="off">
Example 2: disable autocomplete javascript
someForm.setAttribute( "autocomplete", "off" );
someFormElm.setAttribute( "autocomplete", "off" );