Make Google Custom Search results open in same tab

One of the problems I had with GCSE on my blog was that it always opened links in a new window or tab. This wasn't very convenient, but I only had to change a little code in the results code. 
Before Modification:

<!-- Put the following javascript before the closing </head> tag. -->
<script>
(function() {
var cx = '010940491106818468665:ak7ru-numse';
var gcse = document.createElement('script'); gcse.type = 'text/javascript'; gcse.async = true;
gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') +
  '//' + cx;
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(gcse, s);
})();
</script>

<!-- Place this tag where you want the search results to render -->
<gcse:searchresults-only></gcse:searchresults-only>

After Modification (when the results open in same tab):

<!-- Put the following javascript before the closing </head> tag. -->
<script>
(function() {
var cx = '010940491106818468665:ak7ru-numse';
var gcse = document.createElement('script'); gcse.type = 'text/javascript'; gcse.async = true;
gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') +
'//' + cx;
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(gcse, s);
})();
</script>

<!-- Place this tag where you want the search results to render -->
<gcse:searchresults-only linktarget="_parent"></gcse:searchresults-only>

I replaced  <gcse:searchresults-only> with  <gcse:searchresults-only linktarget="_parent">.