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Password type input with autocomplete enabled
The autocomplete attribute works with the following types: text, search, url, tel, email, password, datepickers, range, and color.
The autocomplete attribute specifies whether or not an input field should have autocomplete enabled.
Autocomplete allows the browser to predict the value. When a user starts to type in a field, the browser should display options to fill in the field, based on earlier typed values.

<form action="demo_form.asp" autocomplete="on">

   First name:<input type="text" name="fname"><br>

   Last name: <input type="text" name="lname"><br>

   E-mail: <input type="email" name="email" autocomplete="off"><br>

   <input type="submit">

</form> 

참조:http://www.w3schools.com/tags/att_input_autocomplete.asp