Почему Inputmask is not defined?

<script src="/js/jquery.inputmask.js" type="text/javascript"></script>
	    <input id="phone"   type="text"   class="required phone" name="phone">
<script type="text/javascript">
jQuery(document).ready(function(){
  jQuery("#phone").inputmask("99-9999999");
 
});
</script>