web GL script error

I am using a pair of scripts to open a new tab in a browser from a webGL environment. The strange thing is that in one version of the environment, this works, in another it does not. Both environments are in 5.5, and the scripts are identical, they are as follows-

OpenLinkJSPlugin.cs using UnityEngine; using System.Runtime.InteropServices;

public class OpenLinkJSPlugin : MonoBehaviour { public string DocToOpen;

public void OpenLinkJSPlug() { #if !UNITY_EDITOR openWindow(DocToOpen); #endif } [DllImport("__Internal")] private static extern void openWindow (string url); }

AND

Press Handler.cs using UnityEngine; using UnityEngine.EventSystems; using System; using UnityEngine.Events;

public class PressHandler : MonoBehaviour, IPointerDownHandler { [Serializable] public class ButtonPressEvent : UnityEvent { } public ButtonPressEvent OnPress = new ButtonPressEvent(); public void OnPointerDown(PointerEventData eventData) { OnPress.Invoke (); } }

The two Environments are online at

(working) http://www.stormcloudimages.com/OCEnvironmentWeb/OCEnvWeb.html

(not working) http://www.stormcloudimages.com/OCEnv/index.html

The buttons in question are BioMod>BioModPDF or BioMod>Play Movie

Any ideas would be helpful, Thanks