Type type = Type.GetTypeFromProgID("ScriptControl");//获取脚本对象
            object obj = Activator.CreateInstance(type);//Type
            type.InvokeMember("Language", BindingFlags.SetProperty, null, obj, new object[] { "JScript" }); //设置语言类型

           string resultStr = "";
            try
            {
                type.InvokeMember("AddCode", BindingFlags.InvokeMethod, null, obj, new object[] {"function aa(){return document;}"});//添加JS代码 strJs.Replace("window","this")
                resultStr = type.InvokeMember("Eval", BindingFlags.InvokeMethod, null, obj, new object[] { "aa();"}).ToString();//执行JS
            }
            catch (TargetInvocationException targetEx)
            {
                if (targetEx.InnerException != null)
                {
                    throw targetEx.InnerException;
                }
            }