--- a/s4-main.js	Sun Jun 26 13:51:03 2022 +0900
+++ b/s4-main.js	Sun Jun 26 14:10:54 2022 +0900
@@ -14,6 +14,11 @@
 	mypath = mypath.substring(0, mypath.lastIndexOf("?"));
 	//alert("mypath="+mypath);
     }
+    function escapeChars(old) {
+	return old.replaceAll('"', '"')
+	    .replaceAll("<", '&lt;')
+	    .replaceAll(">", '&gt;');
+    }
     function collectElementsByAttr(elm, attr, val) {
 	var e = document.getElementsByTagName(elm);
 	if (!e) return null;
@@ -1042,7 +1047,7 @@
 		    authtd = repltd.parentNode.getElementsByTagName("td")[0],
 		    author = authtd.querySelector("a.author").innerText,
 		    digest = txt.split("\n").splice(0, hoverTextLines).join("\n");
-		return "[[ "+author+" ]]\n"+digest;
+		return escapeChars("[[ "+author+" ]]\n"+digest);
 	    } else
 		return "";
 	}