autosave form

<form method="post" id="myform" action="/saveform">
    Name: <input name="name" type="text" value="" /><br />
    Address: <textarea name="address"></textarea><br />
    Gender: <select name="gender">
                <option value="M">Male</option>
                <option value="F">Female</option>
            </select><br />
    Interests:<br />
    1: <input name="interests[]" type="text" value="" /><br />
    2: <input name="interests[]" type="text" value="" /><br />
    3: <input name="interests[]" type="text" value="" /><br />
    4: <input name="interests[]" type="text" value="" /><br />
    5: <input name="interests[]" type="text" value="" /><br />
    Sign up for our newsletter: <input name="signup" type="checkbox" value="1" /><br />
    <input name="submit" type="submit" value="Submit" />
</form>