Web Player only can run in opera

I am trying to get a web player to use LoadLevelAsync. When I run the project in chrome or IE there is an error, like this.

But When I run the project in opera it can run perfect.I don't know why, I hope someone can tell me. Here is my code.

 using UnityEngine;
 using System.Collections;
 
 public class Loading : MonoBehaviour {
     
     //构造一个Texture2d数组，用以存放Loading界面中动画所需要的图片。
     public Texture2D[] texture2D;
     private int index = 0;
     private int fps = 12;
     private float time = 0;
     AsyncOperation async;
     // Use this for initialization
     void Start () {
          StartCoroutine(loadScene());
     }
     
     IEnumerator loadScene()
     {
         //异步读取场景。
         //Globe.loadName 就是A场景中需要读取的C场景名称。
         async = Application.LoadLevelAsync(PublicClass.sceneName);
         //读取完毕后返回， 系统会自动进入C场景
         yield return async;
     }
 
     void OnGUI(){
 //        this.guiSkin = guiSkin;
         //循环播放12个图片，以达到动画的效果。
         time += Time.deltaTime;
         if(time >= 1.0 / 12){
             index++;
             time = 0;
             if(index >= 12){
                 index = 0;
             }
         }
         GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), texture2D[1+index]);
     }
     
     // Update is clicked once per frame
     void Update () {
         
     }
 }