页面加载黄色屏幕

Question

I am developing a Wordpress website. Everything is going according to the plan except that I started to get a yellow screen while the page is loading after I made some changes on the single.php and inserted some HTML and JS on the first line.

This does not affect the site in any other way then it's not that pretty to see. Presumably that yellow loading screen is a result of my changes on the single.php. Why is this happening and how could I restore a normal white screen? I attach a screenshot of the "bug" while the page is loading so you can see the issue.

Let me know if you want to see the code (I don't know if it is relevant). This issue happens only when I want to visit a page that uses single.php.

UPDATE:

This is the code I added:

<div class="row-fluid IFKbanner_events"> <!-- IFKbanner_events is a styling class that can vary from page to page. Do not mind it if ot does not exist or has other names on other pages -->
    <!-- Top bar -->
<div id="superettan-topbar"></div>
<script type="text/javascript">
       var teamId, offset, topbarDiv = "superettan-topbar";
       teamId = 9604;
       (function () {
           var sup1 = document.createElement('script'); sup1.type = 'text/javascript'; sup1.async = true;
           sup1.src = 'http://topbar.superettan.se/?teamId=' + teamId + '&offset=' + offset;
           (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(sup1);
       })();
   </script>
    <img src="http://website.se/nywebbsida_test/wp-content/uploads/2013/07/header1920x283.jpg" alt="">
</div>

Answer 1

Since you what those divs and js code on single pages at the top, you should edit header.php like so. Place this where you need to be. This should resolve your issue.

<?php if(is_single()){
       //add the code here
      }
?>