Load HMTL in Silverlight

<UserControl x:Class="HtmlExample.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:HtmlExample="clr-namespace:HtmlExample" mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">
    <UserControl.Resources>
        <Style TargetType="TextBlock" x:Key="StyleText">
            <Setter Property="FontFamily" Value="Lucida Sans Unicode"/>
            <Setter Property="VerticalAlignment" Value="Center"/>
            <Setter Property="FontWeight" Value="Bold"/>
         </Style>
     </UserControl.Resources>
    <Grid x:Name="LayoutRoot">
        <Grid.Background>
            <LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
                <GradientStop Offset="0" Color="#800000FF"/>
                <GradientStop Offset="1" Color="#80FFFFFF"/>
            </LinearGradientBrush>
        </Grid.Background>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>            
        </Grid.RowDefinitions>
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <TextBlock Style="{StaticResource StyleText}" Text="Url:" Grid.Column="0" Margin="5"/>
            <TextBox TextAlignment="Left" VerticalAlignment="Center" Text="http://www.jeremylikness.com/" x:Name="txtUrl" HorizontalAlignment="Stretch" Margin="5" Grid.Column="1"/>
            <Button Click="Button_Click" HorizontalAlignment="Center" Grid.Column="2" Margin="5"> 
                <Button.Content>
                    <TextBlock Style="{StaticResource StyleText}" Text="Load" Margin="5"/>
                </Button.Content>
            </Button>
        </Grid>
        <Border CornerRadius="20" Margin="5" Grid.Row="1">
            <Border.Background>
                <LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
                    <GradientStop Offset="0" Color="White"/>
                    <GradientStop Offset="1" Color="Blue"/>
                </LinearGradientBrush>
            </Border.Background>
        </Border>
        <HtmlExample:HtmlHost Grid.Row="1"
                              x:Name="HtmlHostCtrl"
                              Margin="40"
                              HorizontalAlignment="Stretch"
                              VerticalAlignment="Stretch"
                              HostDiv="htmlHost"
                              Url="http://localhost/TestWebApplication/default.aspx"/>
    </Grid>
</UserControl>

namespace HtmlExample
{
    public partial class MainPage
    {
        public MainPage()
        {
            InitializeComponent();
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            HtmlHostCtrl.Url = txtUrl.Text;
      }
    }
}

<UserControl x:Class="HtmlExample.HtmlHost"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d"
             d:DesignHeight="300"
             d:DesignWidth="400">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition />
        </Grid.RowDefinitions>
        <Border Grid.Row="0">
            <Button HorizontalAlignment="Center" VerticalAlignment="Center" Content="Submit" Click="Button_Click" />
        </Border>
        <Border Grid.Row="1">
            <Grid x:Name="LayoutRoot"
                  HorizontalAlignment="Stretch"
                  MinWidth="100"
                  MinHeight="100"
                  VerticalAlignment="Stretch"
                  Background="Aquamarine">

            </Grid>
        </Border>
    </Grid>
</UserControl>

namespace HtmlExample
{
    public partial class HtmlHost
    {
        private const string IFRAME =
            @"<iframe height=""100%"" width=""100%"" marginheight=""1"" marginwidth=""1"" src=""{0}""></iframe>";

        private const string ATTR_INNER_HTML = "innerHTML";
        private const string ATTR_LEFT = "left";
        private const string ATTR_TOP = "top";
        private const string ATTR_WIDTH = "width";
        private const string ATTR_HEIGHT = "height";
        private const string ATTR_VISIBILITY = "visibility";
        private const string VISIBLE = "visible";
        private const string HIDDEN = "hidden";
        private const string PX = "{0}px";
        private HtmlElement _div;

        private double _width, _height;

        public static DependencyProperty HostDivProperty = DependencyProperty.Register(
            "HostDiv",
            typeof(string),
            typeof(HtmlHost),
            null);

        public string HostDiv
        {
            get { return GetValue(HostDivProperty).ToString(); }

            set
            {
                SetValue(HostDivProperty, value);
                if (!DesignerProperties.IsInDesignTool)
                {
                    _div = HtmlPage.Document.GetElementById(value);
                }
            }
        }

        public static DependencyProperty UrlProperty = DependencyProperty.Register(
            "Url",
            typeof(string),
            typeof(HtmlHost),
            null);

        public string Url
        {
            get { return GetValue(UrlProperty).ToString(); }

            set
            {
                SetValue(UrlProperty, value);
                if (!DesignerProperties.IsInDesignTool)
                {
                    _div.SetProperty(ATTR_INNER_HTML, string.Format(IFRAME,value));
                }
            }
        }
        public void Show()
        {
            _div.RemoveStyleAttribute(ATTR_VISIBILITY);
            _div.SetStyleAttribute(ATTR_VISIBILITY, VISIBLE);
                       Application.Current.Host.Content.Resized += Content_Resized;
            LayoutRoot.SizeChanged += LayoutRoot_SizeChanged;
            _Resize();
        }
        private void LayoutRoot_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            _width = e.NewSize.Width;
            _height = e.NewSize.Height;
        }
        private void Content_Resized(object sender, System.EventArgs e)
        {
            _Resize();
        }
        public void Hide()
        {
            _div.RemoveStyleAttribute(ATTR_VISIBILITY);
            _div.SetStyleAttribute(ATTR_VISIBILITY, HIDDEN);
            Application.Current.Host.Content.Resized -= Content_Resized;
            LayoutRoot.SizeChanged -= LayoutRoot_SizeChanged;
        }
        private void _Resize()
        {
            var gt = LayoutRoot.TransformToVisual(Application.Current.RootVisual);
            var offset = gt.Transform(new Point(0, 0));
            _div.RemoveStyleAttribute(ATTR_LEFT);
            _div.RemoveStyleAttribute(ATTR_TOP);
            _div.RemoveStyleAttribute(ATTR_WIDTH);
            _div.RemoveStyleAttribute(ATTR_HEIGHT);

            _div.SetStyleAttribute(ATTR_LEFT, string.Format(PX, offset.X));
            _div.SetStyleAttribute(ATTR_TOP, string.Format(PX, offset.Y));
            _div.SetStyleAttribute(ATTR_WIDTH, string.Format(PX, _width));
            _div.SetStyleAttribute(ATTR_HEIGHT,
                                   string.Format(PX, _height));
        }

        public HtmlHost()
        {            HtmlPage.RegisterScriptableObject("mySLapp", this);
            InitializeComponent();
            if (DesignerProperties.IsInDesignTool)
            {
                return;
            }
            Loaded += (o, e) =>
                          {
                              _width = Width;
                              _height = Height;
                              if (_div != null)
                              {
                                  Show();
                              }
                          };
        }
        [ScriptableMember]
        public void Message(string eventData)
        {
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        { }
 }
}

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>HtmlExample</title>
    <style type="text/css">
        html, body
        {
            height: 100%;
            overflow: auto;
        }
        body
        {
            padding: 0;
            margin: 0;
        }
        #silverlightControlHost
        {
            height: 100%;
            text-align: center;
        }
    </style>    
    <script type="text/javascript" src="Silverlight.js"></script>
    <script type="text/javascript">
        function onSilverlightError(sender, args) {
            var appSource = "";
            if (sender != null && sender != 0) {
                appSource = sender.getHost().Source;
            }

            var errorType = args.ErrorType;
            var iErrorCode = args.ErrorCode;

            if (errorType == "ImageError" || errorType == "MediaError") {
                return;
            }

            var errMsg = "Unhandled Error in Silverlight Application " + appSource + "\n";

            errMsg += "Code: " + iErrorCode + "    \n";
            errMsg += "Category: " + errorType + "       \n";
            errMsg += "Message: " + args.ErrorMessage + "     \n";

            if (errorType == "ParserError") {
                errMsg += "File: " + args.xamlFile + "     \n";
                errMsg += "Line: " + args.lineNumber + "     \n";
                errMsg += "Position: " + args.charPosition + "     \n";
            }
            else if (errorType == "RuntimeError") {
                if (args.lineNumber != 0) {
                    errMsg += "Line: " + args.lineNumber + "     \n";
                    errMsg += "Position: " + args.charPosition + "     \n";
                }
                errMsg += "MethodName: " + args.methodName + "     \n";
            }

            throw new Error(errMsg);
        }

        var slCtl = null;
        function pluginLoaded(sender, args) {
            //sender.getHost().Content.mySLapp.Message('sdss');
          
            slCtl = sender.getHost();
            //    slCtl.Content.mySLapp.Message(data);

            //alert(slCtl.Content.mySLapp.MyToUpper("Test String")); 
        }

    </script>
</head>
<body>
    <form id="form1" runat="server" style="height: 100%">
    <div id="silverlightControlHost">
        <div id="htmlHost" style="visibility: hidden; position: absolute;">
        </div>
        <object data="data:application/x-silverlight-2," type="application/x-silverlight-2"
            width="100%" height="100%">
            <param name="source" value="ClientBin/HtmlExample.xap" />
            <param name="onError" value="onSilverlightError" />
            <param name="background" value="white" />
            <param name="minRuntimeVersion" value="4.0.50826.0" />
            <param name="autoUpgrade" value="true" />
            <param name="onLoad" value="pluginLoaded" />
            <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50826.0" style="text-decoration: none">
                <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight"
                    style="border-style: none" />
            </a>
        </object>
        <iframe id="_sl_historyFrame" style="visibility: hidden; height: 0px; width: 0px;
            border: 0px"></iframe>
    </div>
    </form>
</body>
</html>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script src="../MessageComm.js" type="text/javascript"></script>
    
    <title></title>
</head>
<body>    
    <button id="btn1" onclick="Submit1('Hello');">
        sdsdssd
    </button>
</body>
</html>

var slCtl = null;
function pluginLoaded(sender, args) {
    slCtl = sender.getHost();
}

function Submit1(data) {
    window.parent.slCtl.Content.mySLapp.Message(data);
}

 <button id="SubmitButton" onclick="window.parent.slCtl.Content.mySLapp.Message('sdsds');" style="width:100;height:50">Submit</button>