use iframeId as it has as value `marviniframe`

ippisite/ippidb/static/js/ippidb-marvinjsmodal.js

@@ -6,7 +6,7 @@ class MarvinModal {
         this.textAreaEl = $('#' + textAreaId);
         this.exportCallback = exportCallback;
         this.marvinSketcherInstance = null;
-        MarvinJSUtil.getEditor("marviniframe").then(function(sketcherInstance) {
+        MarvinJSUtil.getEditor(iframeId).then(function(sketcherInstance) {
             this.marvinSketcherInstance = sketcherInstance;
             this.marvinSketcherInstance.on('molchange', function(){
                 this.exportSmiles(function(smilesString){
@@ -17,8 +17,8 @@ class MarvinModal {
         this.modalEl.on('shown.bs.modal', function(){
             //NB: this must be setup only once the modal is shown otherwise
             // it doesn't work with Firefox (see https://bugzilla.mozilla.org/show_bug.cgi?id=941146)
-            var query = $('#marviniframe').attr('data-smiles');
-            var fingerprint = $('#marviniframe').attr('data-fingerprint');
+            var query = this.iframeEl.attr('data-smiles');
+            var fingerprint = this.iframeEl.attr('data-fingerprint');
             $("input[name=fingerprint][value=" + fingerprint + "]").attr('checked', 'checked')
             this.importSmiles(query);
             this.textAreaEl.val(query);