title: Check for negative numbers in Jquery Validation plugin
body: <p>I am trying to set-up the <a href="http://bassistance.de/jquery-plugins/jquery-plugin-validation/" rel="nofollow">jquery validation plugin</a> and one of my inputs requires a number within the range of -121 and -123.</p>
  
  <p>I have tried using the range() method :</p>
  
  <pre><code>     $("#myform").validate({
         rules: {
           field: {
            required: true,
            range: [-121, -123]
          }
         }
        });
  </code></pre>
  
  <p>However it doesn't allow any numbers to validate. I have tried using max/min as well but they too don't seem to work on negative numbers. Am I missing something?</p>
  
  <p>Thanks</p>