make floating title less cpu intensive

js/viewfeed.js

@@ -2216,13 +2216,9 @@ function openSelectedAttachment(elem) {
 function updateFloatingTitle() {
 	try {
 		var hf = $("headlines-frame");
+		var child = $("RROW-" + _active_article_id);
 
-		var elems = $$("#headlines-frame > div[id*=RROW]");
-
-		for (var i = 0; i < elems.length; i++) {
-			var child = elems[i];
-
-			if (child.offsetTop + child.offsetHeight > hf.scrollTop) {
+		if (child && child.offsetTop + child.offsetHeight > hf.scrollTop) {
 
 			var header = child.getElementsByClassName("cdmHeader")[0];
 
@@ -2236,10 +2232,8 @@ function updateFloatingTitle() {
 				Element.show("floatingTitle");
 			else
 				Element.hide("floatingTitle");
-
-				break;
-			}
 		}
+
 	} catch (e) {
 		exception_error("updateFloatingTitle", e);
 	}