访问TWEBBROWSER里的控件
以下代码可以访问到所有的input标签控件，但像Select和TextArea等要怎么进行访问和赋值呢？

try
HTMLDocument := IHTMLDocument2(IE.Document);
// HTMLDocument.links
ElementCollection := HTMLDocument.Get_All;
for k := 0 to ElementCollection.Length - 1 Do
begin
vk := k;
Application.ProcessMessages;
Dispatch := ElementCollection.item(vk, 0);
HTMLElement := ElementCollection.item(vk,0) As IHtmlElement;
{
// 遍历文字链接
if SUCCEEDED(Dispatch.QueryInterface(IHTMLElement, HTMLElement)) Then
begin
if HTMLElement.tagName = "A " then
begin
Res := "内部文字为了: " + HTMLElement.innerText + "内部标签为: " + HTMLElement.tagName;
MemoResult.Lines.Add(Res);
MemoResult.Lines.Add( " ");
if HTMLElement.innerText = "信仰爱情项链 " then
begin
ShowMessage( "找到信仰爱情了. ");
HTMLElement.click;
end;
end;
end;
}
if SUCCEEDED(Dispatch.QueryInterface(IHTMLInputElement, HTMLInputElement)) Then

with HTMLInputElement Do
begin
if (UpperCase(Type_) = "TEXT ") and (UpperCase(Name) = "USERNAME ") then
Value := "haicao ";
if (UpperCase(Type_) = "PASSWORD ") and (UpperCase(Name) = "PASSWORD ") then
Value := "654321 ";
if (UpperCase(Type_) = "SELECT ") and (UpperCase(Name) = "COOKIEDATE ") then
Value := "2 ";
Res := "类型： " + type_ + " 控件名称: " + name + " SRC= " + src + " 值: " + value;

MemoResult.Lines.Add(Res);
MemoResult.Lines.Add( " ");
//if (UpperCase(Type_) = "RADIO ") and
// (UpperCase(Name) = "R1 ") and
// (UpperCase(Value) = IntToStr(ID)) Then
// begin
// Checked := true;
// HTMLInputElement.disabled := True;
// HTMLInputElement.readOnly := True;
// end;
//if (UpperCase(Type_) = "SUBMIT ") and (UpperCase(Value) = "提 交 ") Then
// form.submit;
end;
end;
except
Result := false;
Exit;
end;
Result := true;

[解决办法]
uses mshtml;

procedure TForm1.FormCreate(Sender: TObject);
begin
webbrowser.Navigate( "C:\Documents and Settings\Administrator\桌面\index.htm ");
end;

procedure TForm1.Button1Click(Sender: TObject);
var
Doc3: IHTMLDocument3;
e: mshtml.IHTMLSelectElement;
begin
Doc3:=self.WebBrowser1.Document as IHTMLDocument3;
e:=doc3.getElementById( "id,select的id属性 ") as IHTMLSelectElement;//用id属性准确定位到一个指定的select上去
if e < >nil then
e.value:= "中国 ";
end;

select的html这样写： <select id= "selectcountry " >......... </select >

textarea请举一反三