title: Change shadow color on failed validation jquerymobile
body: <p>In my jqm app is no space for standard validation messages. I try to colorize the invalid textfields but can't really figure out how to solve the following issue:</p>
  
  <p>How can I change the boxshadow of an input field if the validation fails with some timeout fade effect?</p>
  
  <p>Something like</p>
  
  <pre><code>var fieldIsValid = false;
  
  //validation failed
  if (!fieldIsValid) {
      var myinput = $('#myinput');
  
      myinput.removeClass('box-shadow');
      //and the webkit-box-shadow, how is this called in jqm?
  
      myinput.addClass('invalidShadowClass');
  
      setTimeout(function () {
          myinput.removeClass('invalidShadowClass');
          myinput.addClass('standardShadowClass'); //
      }, 3000);
  }
  </code></pre>
  
  <p>I can't find the section in the theme css, where shadow colors are explicitly set, how has the invalidShadowClass look like?</p>
  
  <p>And is there a possibility to show the invalidShadowClass and remove it after 3 seconds for example?</p>