diff --git a/ext/mass_tagger/script.js b/ext/mass_tagger/script.js
index 26b3e61c..0e4dbcd9 100644
--- a/ext/mass_tagger/script.js
+++ b/ext/mass_tagger/script.js
@@ -24,12 +24,12 @@ function toggle_tag( button, id ) {
     var string = list.val();
     
     if( (string.indexOf(id) == 0) || (string.indexOf(":"+id) > -1) ) {
-		$(button).css('border', 'none');
+		$(button).removeClass('mass-tagger-selected');
 		string = string.replace(id, '');
 		list.val(string);
 	}
 	else {
-		$(button).css('border', '3px solid blue');
+		$(button).addClass('mass-tagger-selected');
 		string += id;
 		list.val(string);
 	}
diff --git a/ext/mass_tagger/style.css b/ext/mass_tagger/style.css
new file mode 100644
index 00000000..c0a2ea6c
--- /dev/null
+++ b/ext/mass_tagger/style.css
@@ -0,0 +1,3 @@
+.mass-tagger-selected {
+	border: 3px solid blue;
+}
\ No newline at end of file