--- a/s4-main.js	Wed Mar 06 09:49:08 2024 +0900
+++ b/s4-main.js	Wed Mar 06 09:55:20 2024 +0900
@@ -1000,7 +1000,7 @@
 	    }
 	    sbtn.addEventListener("click", (e)=>{
 		let uidsort = (sbtn.textContent.indexOf(umode) >= 0);
-		let rows = [], elm,
+		let rows = [], elm, i=0,
 		    tbl = document.querySelector("table.blog_replies");
 		for (let tr of tbl.rows) {
 		    elm = {};
@@ -1011,7 +1011,10 @@
 		    rows.push(elm);
 		}
 		rows.sort(uidsort ? compareRowsByUid : compareRowsByAid);
-		for (let r of rows) tbl.appendChild(r.tr);
+		for (let r of rows) {
+		    tbl.appendChild(r.tr);
+		    r.tr.title = ++i;
+		}
 		sbtn.textContent = uidsort ? amode : umode;
 	    });
 	}