WebBrowser中动态给页面添加js

string jsfile = Path.Combine(Environment.CurrentDirectory, "mzwucom.js");
HtmlElement element = webBrowser1.Document.CreateElement("script");
element.Id = "newjs";
element.SetAttribute("type", "text/javascript");
element.SetAttribute("src", jsfile);
webBrowser1.Document.Body.AppendChild(element);