Improve search retry procedure

www/app/results.js

+const TRIES = 3;
+const TRYDELAYINCRMS = 1000;
+
 function loadXMLDoc(filename)
 {
 var xhttp = new XMLHttpRequest();
@@ -25,19 +28,20 @@ function render(err, content)
 /**
  * Delivers OpenSearch responseXML to callback for the given query.
  */
-function search(query,focus,callback, tries) {
+function search(query,focus,callback, trycount) {
   query = query || "eingabe=";
   focus = focus || "focus=web";
 	let doc;
-	tries = tries || 3;
+	trycount = trycount || 0;
 	try {
 		doc = loadXMLDoc("https://metager3.de/meta/meta.ger3?"+focus+"&"+query+"&encoding=utf8&out=atom10&appversion=3.0.0");
 		callback(null, doc);
 	} catch (e) {
-		if(--tries) {
-			console.log("search error, tries left: "+tries);
-			search(query, focus, callback, tries);
+		if(++trycount < TRIES) {
+			console.log("search error, tries left: "+ (TRIES - trycount) );
+			setTimeout(search, trycount * TRYDELAYINCRMS, query, focus, callback, trycount);
 		} else {
+			console.log("search failed");
 			callback(e);
 		}
 	};