protected override void OnStartDemo(SampleViewport viewport)
{
this.viewport = viewport;
this.htmlhost = HtmlHostCreatorHelper.CreateHtmlHost(viewport, null, null);
SetupHtmlMenuBox();
//==================================================
//box1 test area
//html box
this.testHtmlBox = new HtmlBox(htmlhost, 800, 400);
testHtmlBox.SetLocation(30, 50);
viewport.AddContent(testHtmlBox);
string html = @"<html><head></head><body><div id='div1'>OK1</div><div>OK2</div></body></html>";
testHtmlBox.LoadHtmlString(html);
//==================================================
}
void SetupHtmlMenuBox()