title: value-attribute seems not to show input-field-content
body: <p>I'm trying to use jquery to check if every input-field has already been filled out. And if yes, I'd like to make a green border around the form.</p>
  
  <p>This was my approach:</p>
  
  <pre><code>if($('input:text[value=""], textarea[value=""]').length == 0){
      alert("DONE");
  }
  </code></pre>
  
  <p>Hovever the value="" -Selector doesn't work.</p>
  
  <p>It seems that the value-attribute only contains the input-field's default-value, but not the actual content inserted by the user - according to firebug.</p>
  
  <p>This command alerts me the actual contents:</p>
  
  <pre><code>$('input:text[value!=""]').each(function(){
      alert($(this).val());
  });
  </code></pre>
  
  <p>My Question: Where are the actual input-field contents stored? And how can I use jQuery to check efficiently, if there are empty fields?</p>