diff --git a/js/twister_formatpost.js b/js/twister_formatpost.js
index af8ae1a..d908a39 100644
--- a/js/twister_formatpost.js
+++ b/js/twister_formatpost.js
@@ -402,14 +402,19 @@ function htmlFormatMsg(msg) {
 
                 if (i !== 0) {
                     l = kindOfL(i - 1);
+                } else {
+                    l = 0;
                 }
                 if (j !== msg.str.length) {
                     r = kindOfR(j);
+                } else {
+                    r = 0;
                 }
-                if (i === 0 || l === -10) {
+
+                if ((i === 0 && r < 0) || l === -10) {
                     p.push({i: i, k: j - i, t: -1, w: w, a: -1, p: -1});
                     w = false;
-                } else if (j === msg.str.length || r === -10) {
+                } else if ((j === msg.str.length && l < 0) || r === -10) {
                     p.push({i: i, k: j - i, t: 1, w: w, a: -1, p: -1});
                     w = false;
                 } else {