HTMLVIEW中打开网页，填表提交后 出现脚本异常提示 怎么去除

//屏蔽IE的错误窗口
void CSimOOView::OnNavigateComplete2(LPCTSTR strURL)
{
    // TODO: 在此添加专用代码和/或调用基类
    CComPtr<IDispatch>   spDisp   =   GetHtmlDocument(); 

    if(spDisp   !=   NULL) 
    { 
        CComPtr<IHTMLDocument2> doc;
        spDisp->QueryInterface(IID_IHTMLDocument2, reinterpret_cast<void**>(&doc));
        if(doc != NULL)
        {   
            IHTMLWindow2 * pIhtmlwindow2 = NULL;
            doc->get_parentWindow(&pIhtmlwindow2);
            if(pIhtmlwindow2 != NULL)
            {
                //屏蔽javascript脚本错误的javascript脚本
                //CString strJavaScriptCode = "function fnOnError(msg,url,lineno){alert('script error:\\n\\nURL:'+url+'\\n\\nMSG:'+msg +'\\n\\nLine:'+lineno);return true;}window.onerror=fnOnError;";
                //CString strJavaScriptCode = "function fnOnError(msg,url,lineno){alert('script error:\\n\\nURL:'+url+'\\n\\nMSG:'+msg +'\\n\\nLine:'+lineno);return true;}";
                CString strJavaScriptCode = "function fnOnError(msg,url,lineno){return true;}window.onerror=fnOnError;";

                //TRACE("%s\n" , strJavaScriptCode);
                BSTR bstrScript = strJavaScriptCode.AllocSysString();
                CString strLanguage("JavaScript");
                BSTR bstrLanguage = strLanguage.AllocSysString();
                long lTime = 1 * 1000;
                long lTimeID = 0;

                VARIANT varLanguage;
                varLanguage.vt = VT_BSTR;
                varLanguage.bstrVal = bstrLanguage;
                VARIANT pRet;
                //把window.onerror函数插入入当前页面中去
                pIhtmlwindow2->execScript(bstrScript, bstrLanguage, &pRet);
                ::SysFreeString(bstrScript);
                ::SysFreeString(bstrLanguage);
                pIhtmlwindow2->Release();
            }
        }
    }
    CHtmlView::OnNavigateComplete2(strURL);
}