fix js issues

html/console.html

@@ -27,9 +27,10 @@
 
     $("#reset-button").addEventListener("click", function(e) {
       e.preventDefault();
-      $("#console").innerHTML = "";
+			var co = $("#console");
+      co.innerHTML = "";
       ajaxSpin('POST', "/console/reset",
-        function(resp) { showNotification("uC reset"); },
+        function(resp) { showNotification("uC reset"); co.textEnd = 0; },
         function(s, st) { showWarning("Error resetting uC"); }
       );
     });

html/console.js

@@ -1,5 +1,5 @@
 function fetchText(delay, repeat) {
-  el = $("#console");
+  var el = $("#console");
   if (el.textEnd == undefined) {
     el.textEnd = 0;
     el.innerHTML = "";
@@ -15,9 +15,9 @@ function fetchText(delay, repeat) {
 }
 
 function updateText(resp) {
-  el = $("#console");
+  var el = $("#console");
 
-  delay = 3000;
+  var delay = 3000;
   if (resp != null && resp.len > 0) {
     console.log("updateText got", resp.len, "chars at", resp.start);
     if (resp.start > el.textEnd) {