OO-4323: Horizontal scrolling in large single page course elements

src/main/webapp/static/js/openolat/iFrameResizerHelper.js

@@ -6,14 +6,15 @@ function registerIFrame(iFrameId) {
 	jQuery("#" + iFrameId).iFrameResize({
 		checkOrigin: false,
 		warningTimeout: 0,
+		scrolling: true,
 		initCallback: function(iframe) {
 			if (debugIFRH) console.log("iFrame %s registered.", iFrameId);
-			iframe.style.overflow = "hidden";
-			iframe.scrolling = "no";
+			iframe.contentDocument.body.style["overflow-y"] = "hidden";
+			iframe.contentDocument.body.style["overflow-x"] = "auto";
 			// only needed for IE11 but seams to not brake other browsers
 			iframe.contentDocument.body.scroll = "no";
 		},
-		resizedCallback: function() {
+		resizedCallback: function(iframe) {
 			OPOL.adjustHeight()
 		}
 	});