control passing

See more:

C#3.0

C#

I need a requirement like

1.I need to call javascript to confirm popup box from code file.
2.I need to get the result from the java script.
3.Based on the result, I need to display some content on the Page.

The problem is
1. Before getting the input from pop up box, my code gets executesd.
2. I need to stop the process until or unless user updates the pop up box.

Moved from OP's answer:

protected void Button1_Click(object sender, EventArgs e)
{
  String csname = "PopupScript";
  Type cstype = this.GetType();
  ClientScriptManager cs = Page.ClientScript;
  if (!cs.IsStartupScriptRegistered(cstype, csname))
  {
    String cstext = "confirmProcess()";
    cs.RegisterStartupScript(cstype, csname, cstext, true);
  }
  else
  {
    Response.Write("Process OK");
  }
  Label1.Text = "hello";
}

Here label.text is assigned with "hello" before user clicks ok or cancel button.