avoid adsbexchange link being shown on load.

html/index.html

@@ -658,7 +658,7 @@
 
 								<tr class="infoblock_row">
                                     <td style="text-align: center">
-                                    <div id='adsbexchange_header'>
+                                    <div id='adsbexchange_header' class="hidden">
                                         <span class="largeText">Improve Coverage: <a class="largeText" href="https://adsbexchange.com/how-to-feed/">adsbexchange.com</a></span>
                                     </div>
                                     </td>

html/script.js

@@ -383,8 +383,8 @@ function fetchData() {
     buttonActive('#F', FollowSelected);
 
     var ac_url = [];
-    if (SiteName != "adsbexchange.com tar1090") {
-        $('#adsbexchange_header').hide();
+    if (SiteName == "adsbexchange.com tar1090") {
+        $('#adsbexchange_header').show();
     }
     if (globeIndex) {
         var indexes = globeIndexes();