实现弹出窗口并转到另一个页面

实现弹出窗口并转到另一个页面
string strScript = "";
            strScript += "<SCRIPT language=\"javascript\">\n";
            strScript += "<!--\n";
            strScript += "alert('sssssss');\n";
            strScript += "document.location='Default.aspx';\n";
            strScript += "//-->\n";
            strScript += "</SCRIPT>\n";
            if (!Page.IsStartupScriptRegistered("ssrError"))
            {
                Page.RegisterStartupScript("ssrError", strScript);
            }