阅读以下的Asp.Net代码public class WebForm1 : System.Web.UI.Page｛ protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.HtmlControls.HtmlInputButton Button2; protected System.Web.UI.WebControls.ListBox ListBox1; protected System.Web.UI.WebControls.Label Label1; protected string s1,s2; private void Page_Load(object sender, System.EventArgs e) ｛ s1="姓名"; s2="颜色"; Response.Write(s1+"
"); Response.Write(s2+"
"); ｝ private void Button1_Click(object sender, System.EventArgs e) ｛ s1="Name"; s2="Color"; ｝｝上述代码中Button1_Click为服务器端Button控件的单击事件。那么当单击该Button时，页面将出现（）变化。