asp.net的弹出警告窗口

///<summary>
///提供一个可选“是”“否”的弹出窗口，若选是，则跳到url1,选择否跳到url2
///</summary>
///<param neme="strMsg"></param>
///<param name="url1">是</param>
///<param name= "url2">否</param>
public static void confirm(string strMsg,string url1,string url2)
{
      Page page = HttpContext.Current.Handler as Page;
      page.ClientScript.RegisterStartupScript(page.GetType(),"message","var result = window.confirm('" + strMsg +"');
      if(result)
      {
            window.location='" + url1 +"'
      }else
      {
            window.location='" + url2 +"'
      };",true);

      return;
}