diff --git a/js/show-op.js b/js/show-op.js
index 7bb144cf..14dfe467 100644
--- a/js/show-op.js
+++ b/js/show-op.js
@@ -11,41 +11,40 @@
  * Usage:
  *   $config['additional_javascript'][] = 'js/jquery.min.js';
  *   $config['additional_javascript'][] = 'js/show-op.js';
- *
  */
 
-$(document).ready(function(){
-	var showOPLinks = function() {
-		var OP;
-		
+$(document).ready(function() {
+	let showOPLinks = function() {
+		let OP;
+
 		if ($('div.banner').length == 0) {
 			OP = parseInt($(this).parent().find('div.post.op a.post_no:eq(1)').text());
 		} else {
 			OP = parseInt($('div.post.op a.post_no:eq(1)').text());
 		}
-		
+
 		$(this).find('div.body a:not([rel="nofollow"])').each(function() {
-			var postID;
-			
-			if(postID = $(this).text().match(/^>>(\d+)$/))
+			let postID = $(this).text().match(/^>>(\d+)$/);
+
+			if (postID) {
 				postID = postID[1];
-			else
+			} else {
 				return;
-			
+			}
+
 			if (postID == OP) {
 				$(this).after(' <small>(OP)</small>');
 			}
 		});
 	};
-	
+
 	$('div.post.reply').each(showOPLinks);
-	
+
 	// allow to work with auto-reload.js, etc.
 	$(document).on('new_post', function(e, post) {
 		if ($(post).is('div.post.reply')) {
 			$(post).each(showOPLinks);
-		}
-		else {
+		} else {
 			$(post).find('div.post.reply').each(showOPLinks);
 		}
 	});