Move iframe script to shared script

js/setIframeHeight.js

@@ -0,0 +1,19 @@
+// http://dyn-web.com/tutorials/iframes/height/demo.php
+function getDocHeight(doc) {
+  doc = doc || document;
+  // stackoverflow.com/questions/1145850/
+  var body = doc.body, html = doc.documentElement;
+  var height = Math.max( body.scrollHeight, body.offsetHeight,
+      html.clientHeight, html.scrollHeight, html.offsetHeight );
+  return height;
+}
+function setIframeHeight(id) {
+  var ifrm = document.getElementById(id);
+  var doc = ifrm.contentDocument? ifrm.contentDocument:
+      ifrm.contentWindow.document;
+  ifrm.style.visibility = 'hidden';
+  ifrm.style.height = "10px"; // reset to minimal height ...
+  // IE opt. for bing/msn needs a bit added or scrollbar appears
+  ifrm.style.height = getDocHeight( doc ) + 4 + "px";
+  ifrm.style.visibility = 'visible';
+}

rsvp.html

@@ -70,25 +70,5 @@ <h4>Please RSVP by Sep 1, 2021.</h4>
   </div>
 </body>
 <footer>
-  <script>
-    // http://dyn-web.com/tutorials/iframes/height/demo.php
-    function getDocHeight(doc) {
-      doc = doc || document;
-      // stackoverflow.com/questions/1145850/
-      var body = doc.body, html = doc.documentElement;
-      var height = Math.max( body.scrollHeight, body.offsetHeight,
-          html.clientHeight, html.scrollHeight, html.offsetHeight );
-      return height;
-    }
-    function setIframeHeight(id) {
-      var ifrm = document.getElementById(id);
-      var doc = ifrm.contentDocument? ifrm.contentDocument:
-          ifrm.contentWindow.document;
-      ifrm.style.visibility = 'hidden';
-      ifrm.style.height = "10px"; // reset to minimal height ...
-      // IE opt. for bing/msn needs a bit added or scrollbar appears
-      ifrm.style.height = getDocHeight( doc ) + 4 + "px";
-      ifrm.style.visibility = 'visible';
-    }
-  </script>
+  <script src="js/setIframeHeight.js"></script>
 </footer>