php - Trying to change this from an image to a button, when I change it to look like a button I lose functionality

Solution:

This is occuring because input type="image" has the same functionality of a submit button, while input type="button" does not have any implicit functionality. (It is just a dumb clickable button)

You need to change it to input type="submit"

Solution:

Don't use type="button" in the submitting input! Try to use type="submit" in that "Go" field.

That's because the first attribute value prompt to the browser that the button is literally a normal object which doesn't have nothing to do with that form. Maybe you can use it as a link, or a Javascript event caller ... but not as the submitting action.

So the new code will be:

<form method='post' action='/login.php'>
    <b>Name:</b><br><input type='text' name='name'
    size='19' class='login'><br><b>Password:</b><br><input
    type='password' name='password' size='19' class=
    'login'><br>
     <img src='/layout/blank.gif' height='6' width='1'
    alt='blank'><br>
                <input type='hidden' name='redir' value='$redir'> 
     <input type='submit' name=
    'action' value='Go' style='vertical-align: middle;'
    title='Login'> (<a href='/lostdetails.php' class=
    'menu'>Lost Details?</a>)
</form>

Obviously you can put it in you PHP variable, your choice. If you want to learn more about HTML buttons, you can see the W3Schools documentation about it.