String csname1 = "OnQuitScript"; Type cstype = this.GetType(); ClientScriptManager cs = Page.ClientScript; if (!cs.IsStartupScriptRegistered(cstype, csname1)) { String cstext1 = "window.onbeforeunload = confirmQuit;"; cs.RegisterStartupScript(cstype, csname1, cstext1, true); }
原文：http://www.cnblogs.com/webglcn/p/4843769.html