我是 ASP 的新手，我看到了一个示例，但无法弄清楚为什么使用
<%if cars="Volvo" 然后 Response.Write("checked")%>
代码：->
<!DOCTYPE html>
<html>
<%
dim cars
cars=Request.Form("cars")
%>
<body>
<form action="demo_radiob.asp" method="post">
<p>Please select your favorite car:</p>
<input type="radio" name="cars"
<%if cars="Volvo" then Response.Write("checked")%>
value="Volvo">Volvo</input>
<br>
<input type="radio" name="cars"
<%if cars="Saab" then Response.Write("checked")%>
value="Saab">Saab</input>
<br>
<input type="radio" name="cars"
<%if cars="BMW" then Response.Write("checked")%>
value="BMW">BMW</input>
<br><br>
<input type="submit" value="Submit" />
</form>
<%
if cars<>"" then
Response.Write("<p>Your favorite car is: " & cars & "</p>")
end if
%>
</body>
</html>
任何帮助，将不胜感激