diff --git a/js/catalog.js b/js/catalog.js
index 59b57f6c..3ded2141 100644
--- a/js/catalog.js
+++ b/js/catalog.js
@@ -36,4 +36,14 @@ if (active_page == 'catalog') $(function(){
 	if (catalog.image_size !== undefined) {
 		$('#image_size').val(catalog.image_size).trigger('change');
 	}
+
+	$('div.thread').on('click', function(e) {
+		if ($(this).css('overflow-y') === 'hidden') {
+			$(this).css('overflow-y', 'auto');
+			$(this).css('width', '100%');
+		} else {
+			$(this).css('overflow-y', 'hidden');
+			$(this).css('width', 'auto');
+		}
+	});
 });
diff --git a/stylesheets/style.css b/stylesheets/style.css
index af8a3d8b..1c33f5d0 100644
--- a/stylesheets/style.css
+++ b/stylesheets/style.css
@@ -1244,9 +1244,6 @@ div.boardlist a {
 div.mix {
 	display: inline-block;
 } 
-.theme-catalog div.thread:hover {
-	overflow-y: auto; width: 100%
-}
 
 /* Mona Font */
 .aa {