private void button2_Click(object sender, EventArgs e)

{

string url = "";

for (int i = 0; i < urls.Count; i++)

{

if (!string.IsNullOrEmpty(urls[i]))

{

url = urls[i];

urls[i] = "";

break;

}

}

var doc = webBrowser1.Document.Window.Frames[0].Document;

HtmlElement elefile = doc.GetElementById("file_test");

ImitateSelectFile temobj = new ImitateSelectFile();

temobj.Select(elefile, url);

}