求救：MsgBox,该如何处理

求救：MsgBox
在后台代码中有MsgBox()函数
我用客户端访问服务器时，MsgBox根本不能显示在客户端端上啊？是不是不能这么用阿？
如果通过后台检查后，在前台弹提示消息，应该怎么做啊？

[解决办法]
/// <summary>
/// 弹出对话框根据IsClose的指示是否关掉页面
/// </summary>
/// <param name= "mypage "> </param>
/// <param name= "info "> </param>
/// <param name= "IsClose "> </param>
public static void showmessage(System.Web.UI.Page mypage, string info, bool IsClose)
{
info = info.Replace( "\n ", " ");
//string scriptClientId=string.Empty;
string strscript = " <script language= 'javascript '> ";
strscript += "alert( ' " + info + " '); ";
if (IsClose)
{
strscript += "opener=null; ";
strscript += "window.close(); ";
}
strscript += " </script> ";
if (!mypage.ClientScript.IsStartupScriptRegistered( "ShowMsg "))
mypage.ClientScript.RegisterStartupScript(mypage.GetType(), "ShowMsg ", strscript);

}