Open search result links in same window using CSE for ikutlahaku.com

searchpage

<script>
(function() {
	var cx = 'xx:xx';
	var gcse = document.createElement('script');
	gcse.type = 'text/javascript';
	gcse.async = true;
	gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') + '//www.google.com/cse/cse.js?cx=' + cx;
	var s = document.getElementsByTagName('script')[0];
	s.parentNode.insertBefore(gcse, s);
})();
</script>
<gcse:search linktarget="_parent"></gcse:search>