void Application_Error(object sender, EventArgs e) 
{
　Exception objErr = Server.GetLastError().GetBaseException();
　string error = "发生异常页: " + Request.Url.ToString() + "＜br＞";
　error += "异常信息: " + objErr.Message + "＜br＞";
　Server.ClearError();
　Application["error"] = error;
　Response.Redirect("~/ErrorPage/ErrorPage.aspx");
}
ErrorPage.aspx

protected void Page_Load(object sender, EventArgs e)
{
　ErrorMessageLabel.Text = Application["error"].ToString();
}

＜script language="JavaScript" type="text/Javascript"＞
＜!--
function CheckError_onclick() {
　var chk = document.getElementById("CheckError");
　var divError = document.getElementById("errorMsg");
　if(chk.checked)
　{
　　divError.style.display = "inline";
　}
　else
　{
　　divError.style.display = "none";
　}
}

// --＞
＜/script＞