I've got 3 of this error when validating. 

DOCTYPE: HTML5

**Error: Element link is missing required attribute property.**

```
<link type="text/css" href="/wp-content/themes/aykamakina/bxslider/jquery.bxslider.css" rel="stylesheet" />
<script src="/wp-content/themes/aykamakina/tabs/js/easyResponsiveTabs.js" type="text/javascript"></script>
<link rel="stylesheet" href="/wp-content/themes/aykamakina/fancybox/source/jquery.fancybox.css" type="text/css" media="screen" />
<link rel="stylesheet" type="text/css" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">

```

So I've used rel - type - href and one of them has the media attribute. What others I have to use in this case?

And I don't get why I don't get the same error for the other links I've used only with the same attributes...
Thanks for your time!