input fields are disabled at login in localhost

I try to login via localhost on my Drupal site. What it's difficult to see (without an image), is that the 'text input fields' for user and password and also the button 'loggin' are dissabled (discovered when using Firebug (see code => input field gebruikersnaam).

What I know is that Mozilla ask after a software security appliance, but in this case Mozilla gives me nothing? => I don't know it may be something to do with.

<input type="text" class="form-text required" disabled="disabled" value="" size="15" id="edit-name" name="name" maxlength="60">

Extra information: I'm 开发者_JS百科using firefox Mozilla: 3.6.17.

Using firebug simply right click on the disabled attribute and delete it.

Now you can submit your form