--- a/s4-main.js	Sun May 22 12:19:15 2022 +0900
+++ b/s4-main.js	Sat May 28 22:34:21 2022 +0900
@@ -1,6 +1,7 @@
 // 愛
 (function (){
     var isOlderJS;	// Set in init();
+    var hoverTextLines = 10;
     var hasTouchPad =
 	(navigator.maxTouchPoints && navigator.maxTouchPoints >0);
     var myurl = document.URL,
@@ -1032,6 +1033,30 @@
 	});
 	ta.parentNode.appendChild(btn);
     }
+    function initReplyHover() {
+	function getTextId(id) {
+	    console.log("Getting!::"+id);
+	    let txt = document.getElementById(id).innerText;
+	    return txt.split("\n").splice(0,hoverTextLines).join("\n");
+	}
+	for (let td of document.querySelectorAll("td.repl")) {
+	    let text = td.innerHTML;
+	    console.log(text);
+	    if (text.startsWith("\>#")) {
+		let newline = text.indexOf("\n");
+		let first   = text.substring(0, newline),
+		    rest    = text.substring(newline);
+		td.innerHTML = first.replace(
+		    /#([0-9]+)/g,
+		    (match, start, whole) => {
+			let id = RegExp.$1
+			return '<span title="' + getTextId(id) + '">'
+			    + match + '</span>';
+		    }
+		) + rest;
+	    }
+	}
+    }
     function init() {
 	isOlderJS = !("insertAdjacentElement" in document.body);
 	initGrpAction();
@@ -1040,6 +1065,7 @@
 	initTextarea();
 	initGrphome();
 	initMath();
+	initReplyHover();
     }
     document.addEventListener('DOMContentLoaded', init, null);
 })();