title: jQuery Validate plugin button not working, and digits field
body: <p>I've a lot of problem with a simple plugin, jquery validation plugin:
  I need to set a form with 3 fields, the name (required) the email (required, email format), the phone (not required, number format of 11 digits).</p>
  
  <p>this is the html:</p>
  
  <pre><code>&lt;form class="form" id="contactusform"&gt;
  &lt;div class="row"&gt;
      &lt;div class="col-sm-4 form-label"&gt;
      &lt;label for="cname"&gt;Contact Name*&lt;/label&gt;
      &lt;/div&gt;
      &lt;div class="col-sm-6 form-row"&gt;
      &lt;input id="cname" name="name" type="text" class="form-field" required&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;div class="row"&gt;
      &lt;div class="col-sm-4 form-label"&gt;
      &lt;label for="cemail"&gt;Contact Email Address*&lt;/label&gt;
      &lt;/div&gt;
      &lt;div class="col-sm-6 form-row"&gt;
      &lt;input id="cemail" name="email" type="email"  class="form-field" required&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;div class="row"&gt;
      &lt;div class="col-sm-4 form-label"&gt;
      &lt;label for="cphone"&gt;Contact Phone Number&lt;/label&gt;
      &lt;/div&gt;
      &lt;div class="col-sm-6 form-row"&gt;
      &lt;input id="cphone" name="phone" type="text" class="form-field"&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;div class="row"&gt;
      &lt;div class="col-sm-6 form-send-button"&gt;
      &lt;div class=""&gt;
      &lt;input id="submit" type="button" class="btn send-button" value="SEND"&gt;
      &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p></p>
  
  <p>this is the script:</p>
  
  <pre><code>$(document).ready(function () {
      $("#contactusform").validate({
        rules: {
          name: "required",
          email: {
            required: true,
            email: true
          },
          phone: {
              required: false,
              digits: true,
              minlenght: 11
          }
        },
        messages: {
          name: "Please specify your name",
          email: {
              required: "We need your email address to contact you",
              email: "Email must be in the format of name@domain.com"
          },
          phone: {
              minlenght: "please insert a number of 11 digits",
              digits: "The value must be a number"
          }
        }
      });
  });
  </code></pre>
  
  <p>I'm using the validator plugin and jquery scripts:</p>
  
  <pre><code>    &lt;script src="//code.jquery.com/jquery-1.11.3.min.js"&gt;&lt;/script&gt;
      &lt;script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/jquery.validate.min.js"&gt;&lt;/script&gt;
      &lt;script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.13.1/additional-methods.min.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>This code not work properly, I try many times, and the button doesn't seems to work at all. I need to show message under the reuided fields if submit button is clicked without any value in the fields.</p>